Some debate has already occurred. Joel Smith made some good points regarding what autistic pride should not be, and suggested appropriate ways to celebrate it. Ballastexistenz explained that autistics.org did not snub Autistic Pride Day in 2005, and also echoed Joel's points in the broader context of disability pride.
To try to conceptualize the issue, I have looked up what "pride" means to other movements.
Gay Pride.- "The gay pride or simply pride campaign of the gay rights movement has three main premises: that people should be proud of what they are, that sexual diversity is a gift, and that sexual orientation and gender identity are inherent and cannot be intentionally altered." (Wikipedia)
Black Pride.- "Black pride is a slogan used interchangeably to depict both the movement of and concept within politically active black communities, especially African-Americans in the United States. The slogan has been used by African-Americans to denote a feeling of self-respect, celebrating ones heritage, and being proud of one's personal worth. Black pride as a national movement is closely linked with the developments of the American Civil Rights Movement, during which noted figures such as Martin Luther King, Jr., Malcolm X, A. Philip Randolph, Stokely Carmichael, and others protested the conditions of the United States' segregated society, and lobbied for better treatment for people of all races... A related movement in the 70s to dispel the notion that black people's natural features, skin color and hair was inherently 'ugly.' The movement asked that men and women stop straightening their hair attempting to lighten or bleach their skin to 'look more white.'" (Wikipedia)
Disability Pride.- "Fundamentally, Disability Pride represents a rejection of the notion that our difference from the non-disabled community is wrong or bad in any way and is a statement of our self-acceptance, dignity and pride. It signifies that we are coming out of the closet and are claiming our legitimate identity. It's a public expression of our belief that our disability and identity are normal, healthy and right for us and is a validation of our experience." (Disabledandproud.com)
Deaf Pride.- "My own definition is that: *deafness is a disability which is so unique, its very nature causes a culture to emerge from it.* Participation in this culture is voluntary (I enlisted in 1989). Being a part of this culture has given me a sense of pride. I am no longer alone. I share a language, ASL, with many other people in the Deaf community. I share a history of struggle which is well-documented; not only are stories related to growing up deaf passed along within the Deaf community, but there are countless books as well (my personal favorite is Jack Gannon's Deaf Heritage). I enjoy ASL poetry and Deaf puns/jokes which cannot be translated into written English; they are unique in that they can only be understood within the framework of ASL. I enjoy attending plays and community events which focus on many Deaf issues. I also share many of the mannerisms of other Deaf people: the "deaf applause" cheer, a repertoire of visual expressions and signs which relay concepts far quicker than mere words ever could, a tendency to be more physically-oriented (i.e. tapping my foot, tapping someone's shoulder, blinking lights, etc, to get someone's attention), and so on. Last but not least, I bask in pride when I see Deaf people becoming more and more successful in the world..." (Ldpride.net)
I find the parallels with all these other communities remarkable. In this context, let me try to define what I believe autistic pride is:
Autistic Pride is a movement based on the following premises: (1) That autistics should be proud, not ashamed of who they are; (2) That neurological diversity a gift and a necessary part of human nature; (3) That autism is inherent and pervasive, and cannot be removed without also destroying the autistic person; (4) That autistics have worth and are valuable members of society; (5) That autistics should not be forced to act "normal"; (6) That efforts aimed at curing, defeating and exterminating autistics are inherently misguided.
I also sense there is some doubt as to whether it's appropriate to feel proud of autistics who have done well for themselves, because not all autistics reach this level of achievement. But I don't see anything wrong with celebrating Nobel-prize winner Vernon Smith, for example. Or even someone like Bill Gates (if he were to come out of the closet). This is no more wrong than it would be wrong for the Black community to celebrate Martin Luther King on the basis that not every black person gets to be like Martin Luther King.
And we should be proud of our strengths and talents, which are unique to each autistic individual. There is nothing wrong with this either.
Finally, I want to emphasize that pride is the opposite of shame. We should not be ashamed of who we are. We should not be ashamed of what others perceive as quirks or shortcomings. There is no reason to be ashamed of hand-flapping, fidgeting, rocking and so on. In the words of Autism Diva, the kid is rocking, not robbing a bank!