Like Sean said, that toolbar is gone. In it's place is a status selector that
by default controls all your enabled accounts, and there is a plugin (in both
1.5.0 and the 2.0.0 betas) called Iconify on Away that should do that last bit.
This forum (but only kind of), the Feature Request tracker, the gaim-devel mailing
list, and the irc channels all work with different properties to each of them.
The irc channel is the most immediate but least archived/persistent, the mailing
list and this forum are about equally persistent though the mailing list is
likely to get faster attention and more response, and the feature request tracker
is by far the most persistent and tends to have an acceptable response time
for most things (though a lot things get read and ignored).