Planet Learn
Planetlearn offers over 2,500 interactive computer training videos, books CD ROMs and online courses.   It's all self-paced and there are many categories to choose from including networking, programming, desktop publishing, accounting, word processing, etc.  They claim that you can save up to 15-30% by shopping onliner with them.

Virtual Learn
Virtual Learn features detailed product descriptions, the Internet's largest selection of streaming video previews, and both peer and expert reviews to help you find just what you need. Combining Web commerce with the most valuable information resource available and other training professionals, Virtual Learn is the place to find, sample, and buy training of all kinds: books, packaged programs, CD-ROMs, videos, Web-based and instructor-led training, assessment tools, and experiential learning. Their relationship with over 5,000 providers ensures that they have a learning solution that's right for every training challenge. 

eLearners.com
eLearners.com is a great place for people to find online learning! They list over 23,000 online and distance learning courses and 2,300 degree and certificate programs from over 1,600 colleges and training providers. Their site also includes numerous resources for anyone interested in e-learning, including articles, links, news, mailing lists and more.