This is a nice feature for introducing someone to bitcoin. Simply send them a small amount of money and tell them to bookmark the URL and they're in! Due to the insecurity of email I would then advise them to create a brand new wallet and transfer the money over.
I like the dual currency option/display - very nice for making conversions without having to do the math in your head. This would be good for InstaWallet as well. I would love to see both services flourish. Banner ads as a revenue model looks like a good idea - I see InstaWallet has already incorporated this. Great job guys!
Thanks for the feedback!
I added the email sending option to the API - now it is possible to mass-email bitcoins with a simple script
Maybe I will start spamming bitcoins to my friends later on.
No it is also possible to create wallets with arbitrary ID:s. This feature will be only available through API, since it is too easy to create wallet ID:s with too little entropy.https://easywallet.org/en/api
As for the business model, I will probably use banner ads, but I have also some freemium features in my mind. But I have think about it.
Edit: have to add, I really appreciate what the instawallet guys are doing, and don't want to compete with them. I just thought that instawallet was closing down (at one time they announced it), and wanted also some additional features. So I created my own.