It is also very strange that they support Ripple which has also scam warnings.
http://www.reddit.com/r/Bitcoin/comments/1e5gt5/a_warning_about_krakencom/
Did you even bother to read the comments?
I read the comments. Mixed bag, as usual.
For example: "Naming your company after a well known scam that happened in bitcoinland is probably the first red flag."
The server for beta.kraken.com is in Costa Rica and the server for the signup page is in "Europe" (big place) - that can make one paranoid or wildly enthusiastic, depending on one's worldview.
Watch and wait, I guess. I'm rooting for them (so far).