I've never been big into carnivals, but 
RPM pointed me to a new genetics focused one, 
Mendel's Garden.  I've actually always wished something like this was around, so hopefully I'll be submitting (one of the submission categories is "gene expression")...pass the word.  Looks like you just got 
"scooped" Lei (though this won't go biweekly probably).  The current host is 
Paul DeCelles.