I don't know how I missed this for so long... but I just realized that the CSS Adapters are now a community product. As best I can tell, Microsoft decided to hand control of the Adapters project over to the OSS community and it is now being hosted at CodePlex.
Actually... I do know how and why I didn't catch onto this until now - Microsoft's asp.net site make no mention of the fact that the product has now been handed off to the open source community. (Or, at least it didn't as of the time of this writing.)
At the very least I think it would be nice if Microsoft cued us all in by putting an announcement up on the site... or a least a link to the CodePlex project! Maybe a sticky forum post over at the CSS Adapter forum too.
Fix my own problems
Seeing as the Adapters are now OSS, I suppose I should do the right thing and take it upon myself to fix the issues I've been complaining about lately. Or at the very least I'll open a new issue in the project's issue tracker.
If you're also seeing issues with the Adapters, join in the fun and get involved in the project - open an issue, fix a bug, make a suggestion. You can do it all here.