I'd especially like to bitch at someone (:P) about how out-of-the-box Ubuntu, even dapper, still doesn't support bold Japanese, which means Google search results look like they don't highlight for all Japanese queries. This is fixable and well-documented but apparently everyone who uses Japanese on Ubuntu must install the same hacks. (The fix is known, it's partially Firefox's fault, blah blah blah. Still grumpy about it.)
Also: A guy just gave a demo of another whiz-bang 3d window manager, then revealed it was written Java. Someone in the crowd asked whether it ran on free Java, and he said, "Well, Sun announced it will open-source Java." How do you come to an Ubuntu summit and demo software that isn't free? It's against the whole idea of the thing.