I think TSS is an incredible resource, but one thing I've always found mind-bogglingly lousy is the site's discussion forum implementation... am I missing something?
There is the threaded message hierarchy layed out in a box at the top of the page, then all messages dumped at the same level below, so after jumping to the first message in a particular thread, to see the next reply you either have to go hunting down the page for a similar title or scroll back up to the top and click the next link on the hierarchy. This is so unnatural for reading a threaded conversation that I can't believe nobody has freaked out about it.
For examples of what I see as excellent threaded discussion forum designs, check out 'http://www.dailykos.com
' or 'http://www.kuro5hin.org