I just put my name down for something I might well regret (no prestige to speak of either). Here: WordPress Development Blog - Help Out Development, I've gone under the feed stuff. I don't know what happened to WP in this respect, it did seem pretty much feature-aligned with state of the art when I switched from MT. But they still don't appear to have Atom (except 0.3 which isn't really Atom), or a clue about RSS/RDF.
I hope someone fixes the caching in WP 2.0 soon too - you may have noticed issues…
PS. Just got to the point where I couldn't launch emacs on the server without killing Apache first. Action time. I disabled the built-in cache (as described here), then installed WP-Cache 2.0 plugin (I did have an earlier version of this installed prior to upgrading WP, it worked well), seems much improved so far.
[Danny]