yes, i keep it trimmed so that there are no patches and the whole thing is a fairly consistent length ( i keept it fairly short but it covers from my sideburns across my cheeks, chin, goatee and mustache) but obviously i shave my neck.
As much as i love it and consider it a part of my "image" i tend to shave it completely some time during summer because it really does get pretty sweaty, itll make the rest of your face go red, and large areas of your face won't tan, so if u ever DO want to shave it...
Oh, and clean-shaven with a moustache is for guidos, motorcycle cops and Hitler - just say no.