who has it? what's your account name? what do you think of it? do you have any invites to offer/would like an invite?
personally i think its really cool, though the threading system needs to be a bit better, as it can get really confusing sometimes. there should also be an option to hide extensions as i'm sick of scrolling down waves and suddenly a huge sudoku app hits me in the face.
i've got 12 invites to offer if anyone would like one. PM me your email address (note, you need a gmail account to have a wave account and its really easy to open one).
my wave is email@example.com so yeah. cool.