dcbio.org

Here’s a list of interesting and useful links:

baculovirus.com
biology-online.org dictionary
biorad.com  Great products.  Great service.  Great advice.
bioptechs.com Excellent flow cell equipment!  Highly recommended.
Blast
Buffer Protocols
Cell Bio Protocols A nice list of protocols and resources.
Cell & Molecular Biology Online
DevBio
DnaHack.com full of links and information for the amateur technician. 
GenBank
ImmunoGlossary
invitrogen.com
thelabrat.com  Protocols, info, and more…
Molecular Cytogenetics & Genome Organization 
Molecular Station is a free online WIKI solution.  
New England Biolabs is a great resource!  We all use their catalogue to find restriction sites!
NEB Cutter 2.0
promega.com has a great list of guides for cloning enzymes, protein expression, restriction enzymes, and much more!
Primer 3
protocol-online.org A very complete list of protocols and techniques. 
qiagen.com Has a great technical resource section.
www.sigma.com
SCIRUS science-specific search engine
stratagene.com
Swiss Prot
University of Texas Austin has a nice list of resource related links.
Web Cutter