actually, i was going to suggest a gorillapod too, it's actually the only tripod i've got atm. i figured i might get laughed at by the real pros for not having an arca-swiss on carbon fibre setup though so i didn't mention it...
i asked my mum to pick me up the small gorillapod cheap in hong kong for my P&S, she came with an SLR Zoom model. i ended up buying the small one myself, the good thing about it was that it comes with its own little lens plate (1*1.5cm or so).
the bad news is that (at least with the smallest model) the balls cracked a little too easily, maybe i was too forceful, maybe it was because it was 5 under and i was trying to manipulate it. long story short i ended up gluing some bits together, and accidentally glued the lensplate to the plateclamp.
now i've got my 7D, i've put a small ballhead on the SLR Zoom model, and it has no trouble supporting the weight of ungripped 7D and 70-300L (1.8kg or so combined), even just from the body, no tripod ring...
how big is the wife's camera? the small gorilla is really small, the slr zoom is huge. i think there's a model or two between them, check it out...