Sources for Quotations

[eponymous]

Can anyone recommend a good source (or sources) for quotations? I'm aware of Bartlett's and several on the Internet, but I would like to find a source/sources that's fairly large and comprehensive - those that include less well known and obscure quotes, for example.

[muppetsoup]

http://www.geocities.com/~spanoudi/quote.html

the best i've found so far...

[bibliophage]

The 1919 edition of Bartlett's Familiar Quotations and the 1988 edition of Simpson’s Contemporary Quotations are both online and both searchable. See http://www.bartleby.com/index.html

I have had good luck using text searches with search engines to track down the source of quotations that I know the exact wording of (at least in part).