Since releasing Wallet for Mac 3.2 with Dropbox syncing support earlier this month, we’ve received countless emails wondering when Dropbox support would also arrive in the iPhone version. While it’s a great addition to Wallet’s feature set, it’s admittedly of limited use without support for all devices.

The wait is over. Wallet for iPhone 2.2 is now available, bringing support for syncing with Dropbox. Like the Mac version, you can set it up just like MobileMe syncing. It’s totally seamless, and best of all, Dropbox is totally free.

By popular demand, we’ve also added support for attaching photos to individual entries. Add any photo from your library to an entry, and it will be securely encrypted along with your database. The attachment will even sync back to your Mac(s) and/or other devices.

So what’s next for Wallet? We hear this iPad thing is pretty cool…