Hi,
I've been reading the forum posts about the issues with Bitcoinica today and it is raising some questions for me:

1) I currently do not have any BTC, but I am planning to purchase some and I am interested in keeping it in an e-wallet. Are all e-wallets susceptible to the same problem that Bitcoinica faced today?

2) The e-wallet service I use allows me to back-up my wallet to dropbox or google drive; would doing so save me from an event like Bitcoinica experienced today?

I'm still learning to understand this stuff and I am interested in detailed explanations if anyone is willing to take the time to explain it as it relates to the current Bitcoinica problems.

Thanks,
Jugg