thanks for the advice, everyone. as it's time for some new jeans anyhow, i've opted for the slightly baggier look. hopefully that'll help.
and as far as running goes, i'm afraid that won't help much. most of my behind's structure is due to my tailbone sticking way out for some reason. (i've seen the xrays at my chiropractor.) i also bike about 15 miles daily and that is probably making me maintain muscle in the glute area. but i'm not going to stop biking.
anyhow, i'll work on altering my pant style, trying the belt idea and see how that goes.
thanks again, guys.