The online collection of historic records at FamilySearch has just hit the 600 mark! Amazing! I found a very insightful and informative article about this by Leland Meitzler on his Genealogy Blog! To see all of the collections available, go to FamilySearch.org.
If you would like to help with the indexing, become a volunteer. This would be a great way to "give back!" Check out the details at indexing.familysearch.org. Who knows, you just may end up indexing some of your relatives!