I just use a Bento box type device. Its actually the one made by profile designs. See it here.
http://www.profile-design.com/2006_p...ion/epack.html
I raced this morning, I had a tube, 2 16g CO2 cartridges, some pre-glued patches, an airchuck microinflator thing, and 2 Gu gels. Fit everything fine. I'll probably be sticking with this for training rides too. I can get tires off and on without levers so I leave them home.