I use Dainese shin/knee and elbow/forearm guards, they work really well:
Comfortable
Good protection
Nice and cool, no more sweaty shinguards

I might pick up some upper body armor sometime, I keep going faster and bigger and I'm getting slightly scared. Several of my friends race and one weekend a guy had a big fall and broke a rib, another weekend a girl I know split her side open during a crash, 12 stitches...