I'm sure we'll eventually have t-shirts, hats, calendars, etc. etc. but for now, I've set up a special paid package called, "Team Wetpixel" that you can subscribe to by using the subscriptions control panel.
As mentioned in this poll, I'm working on a way to have a low-cost subscription that enables a low-bandwidth, ad-free version of the forums. This package is just for those of you who said you'd probably donate even if there wasn't an ad-free version as a perk.
Offers a way to support Wetpixel! Funds are used to build new features and to support the hard-working staff behind the scenes.
Aside from feeling warm and fuzzy, you also get more image upload space per post, attachment support in private messages, and more storable messages. Most importantly, you'll get access to a "Lite" version of the Wetpixel forums, which will allow you to browse and participate more quickly.
This package does not auto-renew, but you will receive a warning e-mail two weeks before expiration. Payment is via Paypal or credit card only (you can pay via credit card through paypal without opening an account).
[more info: subscriptions control panel]
Thank you for your support!
UPDATE: Here's a movie of the new low-bandwidth skin at Wetpixel.