They haven't said too much about their progress, but we've summarized what little there is here:
http://blueseq.com/knowledgebank/eme...s/ibmroche454/
Basically, they're creating a solid state nanopore called a "DNA Transistor" by using layers of alternating materials which will allow for precise control of the speed (and direction) of molecules traveling through the pore. My guess is this is a few years away from commercialization (if ever).