There are several groups who do 2 meter side band work. I don't know if you call it DX but EME (bouncing a 2 meter signal off the moon ) and talking to a ham in new york on 2 m SSB EME is waha I call DX. also fome folks wotk 2 meter ssb tropo to hawaii from calif, wa and ore. it is possible, but you need a bit of power and a set of good antennas. 73 tom N6AJR
some sites:
K5oe site
http://members.aol.com/k5oe/ another site
http://www.elite.net/~k7xq/k7xq.html side winders on 2
http://www.swotvhf.org/