about the navigation icons... the one you use for posts has always been used to mean "chat" on every place I've ever seen it on the internet. When I saw it yesterday after my nap, my first thought was: We have a chat feature? Granted, hovering my mouse over it quickly identified it as showing my posts instead, but I can see where it might confuse newbies.
Also, is there really that great of a demand for a way to see our own posts without going to our profiles? I'm just wondering if it's really a necessary option.