You can use your programming skills as a hobby, as @nightcracker suggests. Alternatively, you can try to apply them in research at university, which is what my answer is about.
There are several areas of research in biology where programming skills are important (see the Wikipedia entry on bioinformatics). Ones that are very close to biochemistry deal for example with predicting structures from amino acid sequences, with one goal to understand how posttranslational modifications affect the ability of proteins to form complexes.
More generally, and more in line with what you have done so far, there is big challenge in biology that the experimental procedures are becoming increasingly powerful, so that they produce huge amounts of data, which cannot simply be analyzed by taking an average on an Excel sheet. Writing simple data analysis procedures can save other experimental biologists tremendous amounts of time. Such small programs are usually extremely situational, and thus not of commercial interest. However, they can make the difference in being first to publish, or in getting any interesting results in the first place.
If you're at all interested in doing science, you can start right now on your first publications, since as a student of biochemistry who understands programming, you're uniquely qualified to help solve other biologists' problems: It is not sufficient to be able to program to do scientific programming, you also need to understand what you're doing if you want to produce something useful.
I thus suggest that you have a look at what research is done at your university. Are there already people doing bioinformatics? Are there labs doing medium-to-high throughput work that don't know what to do with all their data? It may not be too late to start a summer job in a research lab, and you certainly can find a project for next semester.