Blah! I really don't like waiting for Bards and Druids until a future handbook. They're pretty distinctive classes from the others, which means if someone wants to play one (or try to "convert"), I have to fudge it until later.
Or use a 3rd party supplement that will detail those classes before WOTC does.
One of the things I really dislike the most about what we're being told on 4E is the "piecemeal" way some things are going to be delivered. I know that to some degree, that's the way it is in every edition, but when it comes to core classes, races, and monsters that we're all familiar with and have been part of the "base" set in every previous edition, it just feels wrong to leave some of that out in the beginning.