We do a composite of sorts...Once upon a time, we did a composite with a sister chapter, but they have since disbanded and we are left on our own. They were huge and very hard to do anything with since we technically do not have a house and merely live in apartments together (even though we're not required!

) What we do now is we bought a Sears Portrait Card, and we pay for the sitting fees and all of that stuff out of our membership dues. We all wear black and bring some yellow roses and I think it turns out very nicely. On our website, in the middle one or two of the pictures is from our Sears "Composite"
http://www.kettering.edu/~betasigb/
The portrait card though, can be used throughout the year by any of the members so it really works out great for our graduation photos and everything.
Along with this, we also have a Historian office which keeps all sorts of old memory books and photo albums. For us, they date back to 1976'ish, before we were Beta Sigs, actually a few groups prior to being Beta Sigs

It's really great to be able to look back and see the history of our chapter and remember where we came from!
Hope that helps