Other than clothing items and the bike itself, here are the two pieces of gear I've been the most impressed by on this trip:
My primary bag, i.e. the one with my repair tools, personal items, and clothing, which hangs off the bike's rear rack. The Ortlieb company has definitely earned one very loyal customer, and a definite convert to the no-zipper nautical style for 100% waterproof storage.
This phone. If you are not currently with AT&T and your commitment to your existing cell provider has expired, I think switching to the Blackjack II with AT&T is a no-brainer, particularly if you travel. Worst-case scenario is they charge you $99 for the phone and then toss in some additional discounts on service, which is an amazing deal given this thing's capabilities (including true GPS functionality in a compact/rugged design that still includes a keyboard).