(I thought I posted this earlier, but it's not here, so I guess I didn't.)
So, Gwibber isn't working. It as kind of almost working when I installed Ubuntu (10.4, 64-bit)--the "broadcast accounts" option under my name was doing what it does, but I still haven't seen the program actually function--and now, it's not opening, and "broadcast accounts" is not opening, but system->prefrences->broadcast preferences is opening.
I had a problem at the beginning where my facebook account wouldn't register properly in "broadcast accounts". Then, I installed some basic update to gwibber, and then that worked fine. But just a little while later, nothing was working at all.
In case this is a clue: the top-right notification boxes seem to show up a whole box-area lower than they should. This is another annoyance, but I feel like it might possibly be solved if I get gwibber working.