walletbit.com looks professional but the person behind it is anonymous! There is no name or address information on the site at all. The only information you can find is through a domain-whois query:

No real name ("Gain, Code" ?), no real address ("Copenhagen, na 1550" ?)....same for codegain.dk and bitmon.me

I'm not saying they are a scam, they might be honest, but the guy behind mybitcoin.com was also anonymous and we know how that ended....


Tradehill has announced that they will start an online wallet service at http://www.bitcoin.com , i would rather trust them than anonymous:
https://bitcointalk.org/index.php?topic=37883.0