I don't read many eBooks. If I did, I would probably get an iPad and read 'em there. But I recently downloaded a couple of free eBooks on programming, and both came (only) in the ePub format. Now what?
There doesn't seem to be any good and free eBook readers for the ePub format, but there is a nifty plugin for Firefox that works just fine. It's not a perfect solution, but it's good enough.
What do you use to read eBooks?