Here's my e-reader timeline:
Mar/April 2010 - Bought Kindle 2
Aug 2010 - Bought Kindle 3, gave Kindle 2 to fiancee's mother
November 2010 - Bought nook
December 2010 - Gave nook to brother
June 2011 - Got iPad 2 for my birthday, gave Kindle 3 to fiancee
So, I don't lend them out, I pass the gift of e-reading along
.