Are we having some confusion with the wording? "Speech" vs "language"? I don't want to nit-pick, I used "speech" in my first post when I meant both speech and language. I just wanted to make sure we're all talking about the same thing.
If it's a language issue, and has more to do with the social norms of using language, I could see that it would be much the same with HFA and Aspergers. Just the social appropriateness, or whatever you'd want to call it. Or for example, oldest DS tends to pronounce words exactly the way they're spelled, even if he's told differently, his brain sees it the way it's spelled and doesn't really "get" the gray area of odd pronunciations.
If it's speech, the enunciation, does that happen with Asperger's? I'm not sure. Youngest DS had both speech and language delays. And he still has both, only to a lesser extent. Around here, they tend to lump speech and language together when the child is young, and then seperate them as the child gets older.
qualitative impairments in communication as manifested by at least one of the following:
1. delay in, or total lack of, the development of spoken language (not accompanied by an attempt to compensate through alternative modes of communication such as gesture or mime)
2. in individuals with adequate speech, marked impairment in the ability to initiate or sustain a conversation with others
3. stereotyped and repetitive use of language or idiosyncratic language
lack of varied, spontaneous make-believe play or social imitative play appropriate to developmental level
Just for reference.

It *looks like* what it is saying (and I'm no doctor) is that the Speech Issues (specific pronunciation) isn't determinate one way or the other. It's Language. And while I'm thinking that most of our kids do have speech issues, that isn't part of the criteria. The criteria 2 and 3 read like they could be applied to Aspergers just the same as Autism, so bookwormde's suggestion that they use the same therapies seems reasonable, so long as the child is HFA and can "use his words".
The DSM for Aspergers reads as:
IV) There is no clinically significant general delay in language (E.G. single words used by age 2 years, communicative phrases used by age 3 years)
and that's all it says about language at all.