Thanks to Josh Barrett over at Tablet Legal for pointing out a new feature in a recent update to one of my favorite and most-used apps, Dropbox. Now you can send a file from any app to Dropbox just by pressing the "Open In..." button. Dropbox will automatically open, and you'll be given the option of to which folder you want to save the file.
As Josh says, this solves part of the iPad's email problem; you can now save email attachments to Dropbox from the iPad, where previously you could only do it from your computer. Now, if only the iPad would allow us to attach files from our Dropbox, we'd be all set, right?