I have been using epub books from my Library in Winnipeg,Canada for a couple of years. My complaint to the Library is that some of the best, or my favourite authors are only available in mp3 audio format or ipod compatible format. I want epub. There is much less variety in epub format. Right now Kindle isn't an option in Libraries in Canada I don't think. Not in Winnipeg anyway. This makes the waiting time for epubs very long. Right now I am number 29 out of 32 for one of the books on my waiting list!
I don't know what the outcome would be if Kindle were available. Download them, strip the DRM off and put them through Calibre, so maybe we would have more options!