A good tip from the NY Times Gadgetwise column:
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It is possible to use Dropbox as a transfer point for files between your computer and your iPad. To make it work, you just need to open the ePub files in an app that can open them, like iBooks or another e-book reader app.
Once you have copied the ePub files into the Dropbox folder on your computer and they sync up with the Dropbox app on your iPad, tap an ePub file to open it. When the Dropbox app displays the “Unable to View File” message, tap the Action menu icon in the upper right corner of the iPad’s screen.
In the “Open in” menu that appears, you should see a list of apps on the iPad that can open the ePub file. Pick the app you would like to use for storing and reading the e-book on the tablet.
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