Haha the ideas in this thread are awesome(ly funny). When gear comes to mind I don' think of gimmicked items for magic, as these tend to be items that are sold under the standard magic props etc.
For me gear screams something new and fashionable that could take magic out from the old sterotype, not just of stage magic but street magic...
Anywho on to some of my ideas, apart from theory 11 logo stuff on everything!
A belt with a clip on the front for a lighter (as in Cyril's belt buckle in his cigarette routine video) is very cool, but fear might already be done. So why not take it a step further? A buckle with space for an entire deck of cards including case! If designed properly it wouldn't look overly large and could be quite stylish. What could be better than whipping out a deck of cards like that, or even a killer ending on the ACR by having the selected card in the card case in the buckle!
A fully kitted out jacket of many different styles materials etc (leather, etc you name it). Standard sizes, made to order, with all the false pockets, "lead to pockets" (one pocket leads to another), clips and hooks for elastics (ravens etc) and threads, etc etc. Ideas for the jacket could be endless! Obviously the jackets would have to be nice enough to by standard, but with the added bonus of helping your magic!
Theory11 bag, bandana, socks, you name it!