Its not too much really I think. You would just increase the pool of avatar images available to choose from, when certain conditions were met. To really gamify it though, it would be nice to have some more bells and whistles.
e.g An alert popop when an unlock was made
I can't do it in the near future realistically, but I can move the project onto GitHub so others can at least work with it. Its currently only on Bitbucket