When I look at browser games, what I'd like to see is an offline demonstration of play - so I don't have to sign up to see what it's like, I can just, like, crazily enough, play. No typing in my e-mail, no trying to make out capture images and waiting for e-mails to click on the activation link in them. Just play.
The funny thing is not only that, but so many browser games have the most plain, non descriptive front end - can't really tell anything about the game from it? Does that work for the vast bulk of people - some kinda mystery that draws them in? Just puts me off.
Anyway, I'm coming up with an offline version of my new group zombie hunting add on to my Driftwurld browser game. I think it'll be fun - just have to decide whether to release it soon and then the online version latter, or wait alot longer and release both at the same time?