The fuss (and I'm not saying I agree with it) is that some people with diagnoses of Asperger Syndrome and PDD-NOS are worried that any services or support they are currently receiving will cease as their diagnosis will no longer be considered valid by the providers of said services.
To be honest, I think a more sensible way of looking at it is that we'll just all be classified "autistic" rather than having our diagnoses removed, but bearing in mind we are in a recession, it could be the case that cash -strapped services decide to restrict their services to only support those with a diagnosis of 'pure' autism, so to speak.
There is also the ongoing idea perpetuated by the media and by organisations like Autism Squeaks that there is an "epidemic" and that autism cases are increasing. I would argue (as would many others) that it is just a case of better understanding of the condition leading to more people being diagnosed who would previously have been misdiagnosed or left with no support, but sadly not everyone sees it this way.
So some are saying that the new diagnostic criteria will be narrower so as to reduce the number of people being diagnosed, and most likely this could result in those of us diagnosed as aspie or HFA being overlooked.
I couldn't find a working link to it, but a couple of researchers tweeted that one of the lead psychiatrists involved in writing the new DSM said that people who call themselves "aspie" probably aren't actually autistic! I think that if this is what s/he actually said, it is highly ignorant and probably based on the ridiculous assumption that if you have an opinion about how you are treated by society, you're not allowed to be autistic...the belief that true autistics can only be passive beings in a perpetual child-like state which is highly offensive and not actually true of ANYONE on the spectrum, even those with more substantial support needs.