Hi again,
Well, the post disappeared because it was set to expire (meaning lose its "announcement" status) after 15 days or so. Ordinarily it's not an issue as new posts are added, but because no one is currently doing new posts, the holes are noticeable. As for things being slow again, please post a link or explain which pages seem slow. If everything just seems slow in general, I'll have to look into it.
And finally, the "how you can help" page is currently being re-vamped. I actually just checked-in a new version which does once again filter to your collection (as of yesterday it didn't), but it's very chuggy, so please go easy on it until I get a chance to smooth it out!
Hang in there, everything will be groovy once again.