I really don't buy the user-hostile argument. You write your code and you get a SWF. Youtube has SWFs. Newgrounds has SWFs. DeviantArt has SWFs. Normally the t

I really don't buy the user-hostile argument. You write your code and you get a SWF. Youtube has SWFs. Newgrounds has SWFs. DeviantArt has SWFs. Normally the thought of whether something is running in a sandbox is not a concern if I'm using any of these sites. The only times I would get annoyed by load speed issues had nothing to do with the SWF format, it would usually be of the magnitude of the whole site being overloaded. I could say Meebo doesn't feel native to the browser either, but I think we're way too much into the opinion territory to be saying that, generically speaking, x or y technology is hostile to all users (especially without knowing what the app is to begin with).