My gut feeling is that there is a large need for good query/visualization tools of the datasets the sequencers produce. At least, I think if researchers could "play" interactively with data they would be pretty excited. But I am most definitely non-expert in this area, so take that with a grain of salt. I sometimes think about whether or not tools developed with column stores (e.g., the programming language J or something like KDB+) would actually be cool for data exploration.
For visualization, check out:
http://genome.ucsc.edu/
Also, a huge list of projects is at:
http://en.wikipedia.org/wiki/Genome_browser
In the genomics analysis space, it seems that I hear these three tools mentioned for sequence alignment are tophat, BWA, and MapSplice.
http://bio-bwa.sourceforge.net/
http://www.netlab.uky.edu/p/bioinfo/MapSplice
http://tophat.cbcb.umd.edu/
These are actively maintained projects that I think are mostly developed inside of various academic research groups.
There is also The Cancer Genome Atlas project at:
http://cancergenome.nih.gov/
You can probably find research groups via TCGA that might appreciate some one-off development or support, but it might not be exciting from a tech viewpoint.
There is a ton of EMR (electronic medical record) data out there in free text. If you have skills or interest in things like Lucene/Solr, I would bet that almost any research hospital might appreciate your time and skills. And, if you talk to the right group, want to hire you . . .