Evaluating Sourceforge projects to help on

[Stephen Anthony]

Hi,

With some time on my hands now (very strange situation....), I would
like to help out on some open source projects to keep my skills somewhat
current, etc.

Question is, looking at Sourceforge, there are a bazillion (well close)
projects looking for people. Fine, but how should I evaluate whether I
want to help them? What criteria would be applied? 

Are there other venues, other than Sourceforge to look at?

Many thanks for advice,

STeve