I'd like to suggest some clothing items and merchandising that are both cheap and not usually given out as conference goodies.

• Socks - only 2 or 3 sizes needed, and nice socks with a nice logo would rock. I see custom socks from SockGuy retailing at $9 per pair, I imagine that we could order custom socks for around that price.
• Bandana - these things can be used for lots of things - a scarf, a cravatte, or a bandana. They look pretty cool too. Custom printed at Bandanaman for around $2.50 per item.
• Mugs - cheap, easy to print, use them every day. You can do mugs at CafePress or Zazzle. Zazzle appears to give better deals - mugs starting from $13 at both, but Zazzle gives a discount per item if you get a volume run (the plain mug would cost $10 each for 300 mugs

Outside of those, I can't imagine something I would use very often, unless it's related to my laptop, my mouse, my bike or running - best to make t-shirts, one other unusual but useful item, and avoid creating things which will end up in the bin. I'd really like the socks, but it seems like the mugs might be easier & more popular.

Dave.