My .Xdefaults:

URxvt*background:       rgba:0000/0000/0000/aaaa
URxvt*foreground:       grey80
URxvt*colorBD:          white
URxvt*font:             xft:Lucida Typewriter:pixelsize=10
URxvt*depth:            32
URxvt*scrollBar_right:  true
URxvt*saveLines:        32768
URxvt*scrollTtyOutput:  false
URxvt*scrollWithBuffer: true
URxvt*geometry:         102x44
URxvt*termName:         xterm-color

Big screenshot

Compiz is pretty sweet, rough around the edges (I wish there were some nice-looking decorator themes that weren't vista ripoffs) but worth the trouble for some people. Some time I'm going to get around to messing around with shaders and write a plugin or something.