Here's the poll results I spoke about concerning everyone's preference for GUI or Web clients:

A desktop client/wallet was hugely preferred. Admittedly a sample size of 16 people isn't statistically significant, but it's something to think about. There's a discussion about it in the
thread on the forum.
I quoted this because frankly, common sense tells you its what people would prefer.
Online based wallets gives people less control, plus there's more risk.