Love the fisheye, and how it really makes me rethink composition. However, it is also really unforgiving if you don't have it level, and my tripod head is pretty much impossible to level left to right.
So let's see...the Amazon purchase list is likely to grow from two cheap shutter remotes (mine broke the other night at DAK, so I figure I'll buy two this time to be safe, they're only $7
) to include a new tripod head, likely a ball head.