http://www.embroiderylibrary.com
The designs stitch out beautifully, are reasonably priced, and the site has great tutorials and project ideas. If you see something you like, add it to your wish list as they sometimes have wish list sales and everything on your list will be half price.
http://www.oregonpatchworks.com/
If you sign up for the newletter on this website you will get emails notifying you of great sales at lots of different sites.