I love Goodreads too; I started putting all my 2008 reads and more there to keep track of them - user name Liviu as here
http://www.goodreads.com/review/list/1229019
Library Thing just did not work for me for some reason.
I try and add mini-reviews to all the books I've been reading since I started making the list, and I added listings for several who are e-only and are not found in their databases.