Cell Biology University of Arkansas
International Society for Matrix Biology
Nucleic Acids Research maintains a much more complete annotated list of the leading Molecular Biological Databases, a good place to start looking.
BIND - Biomolecular Interaction Network Database
Bill Wasserman's Dev. Biology Page
HUM-MOLGEN Human Mol. Gen. Forum
OMIM: Mendelian Inheritance in Man
I use the Biobar Extension for Firefox, because it provides a quick way to search most of the major databases (NCBI, EBI etc, and I think it's great!
dbSNP - SNP database
Wise2 Protein HMM search
Algorithms in BioInformatics - tech.
Protein structure prediction - Article
InterPro - Protein signatures
Motif BioInformatics Server - Protein modelling
Biocompare - Buyers Guide for Life Scientists
Invitrogen & Life Technologies
Getech - Educational discount for computers