I'm bemused at the moment, because I recall seeing them at the bottom of the "Post An Entry" page (in very light grey type) but now I'm not seeing them anywhere, no matter which of my accounts I log into (so obviously I'll need to do some more digging). It's from that location (wherever it is) that I just scooped the tags, which explains why it may seem to be a non-intuitive and incomplete list.

Ah-HAH! Here it is! When you hit "Preview" they show up: Allowed HTML: [a] [abbr] [acronym] [address] [area] [b] [bdo] [big] [blink] [blockquote] [br] [caption] [center] [cite] [code] [col] [colgroup] [dd] [del] [dfn] [div] [dl] [dt] [em] [font] [form] [h1] [h2] [h3] [h4] [h5] [h6] [hr] [i] [img] [ins] [kbd] [li] [map] [marquee] [ol] [p] [pre] [q] [s] [samp] [small] [span] [strike] [strong] [sub] [sup] [table] [tbody] [td] [textarea] [tfoot] [th] [thead] [tr] [tt] [u] [ul] [var] [xmp]

(Angle brackets replaced with [ ] so they'll display...