A macosxhints post details how browsing the iTMS (as some might assume) works quite a bit like Safari. The poster discovered that clicking and holding on either the forward or back button in the iTMS will reveal a drop-down history menu. This ought to make browsing a bit easier for the chronic iTMS user (just don't blame us for the bill).
I also noticed a little while ago that the standard Safari keyboard shortcuts of cmd + [ or ] will act as a back/forward command in the iTMS as well. Now all we need is bookmarking ability and a del.icio.us-like system for publicly marking and sharing albums for fellow users, and we'll be all set!