I'm still using x-ray film. Only the one type so far, the 5x12 Kodak dental panorama film that Shane Booth kindly gave me. It's very worthwhile stuff to use. Mine expired in 2009 and as far as I know was never frozen. It's green sensitive and I've found it very forgiving, which surprised me, given what I've seen of others' results and stories of x-ray film in general. I rate this stuff at ISO 100 and develop it in PMK 1+2+100 for 8 mins. It handles shadow detail well and doesn't seem too ready to block up highlights. I'm wondering if as it's aged its response has flattened out, i.e. the curve has dropped down from the typical high contrast of x-ray film to one more like the lovely HP5+. Whatever the reason, I'm enjoying it. I've even cut some down to 4x5. The downside is that it's VERY susceptible to scratching. I develop it on glass in trays, and that has been a big help, but loading and cutting has to be done very carefully.
Out of curiosity, what film do you use, Andrew, and where do you get it?