I'm using a canon gl1. Do you need to use a tripod or is it possible to use the adapter with handheld shots?

it's ok to use the letus handheld... i do it all the time. i suggest you practice a lot before you go out on a formal shoot, however, especially if you don't plan on using the magnet trick to flip your lcd.

Yes, I would also recommend practice when doing something like that. Heck, it takes practice to work with just a WA or telephoto lens screwed in. I can't imagine how awkward it would be working with a 35mm adapter handheld (since I don't own one).