I just got my hopes for another case dashed: I found one of the \"portfolio\" style cases where the front cover flips over the top, instead of the side, that appeared to be roomy enough for a 5600, with a clip that appeared to be a little less secure, but a lot more convenient for inserting and removing, than the Strongman. It has a pair of clips on the sides that come straight up and over, and one of them slides in and out (with a spring to keep it under tension). Slipping the Z in and out one-handed would be easy, which is not the case for the Strongman.
Unfortunately, the 5500 is too thick for it: instead of coming over the top, the bent-in parts of the clips press against the sides of the Z, and don\'t hold it well at all. A 5600 would be worse, unless you were willing to do something to the clips (like, say, filing down the bent-in parts, and attaching some kind of angle brackets to make them taller). Which is too bad, because it\'s one of the few cases I\'ve seen that\'s big enough to wrap around a thick PDA.
The brand name is \"Icon\", and it was $15 at Circuit City. They gve me a refund, but I thought I\'d save others the trouble of finding out the hard way about the non-fit.
Ran