Macwage,

I always wear a sporran* (smooth leather with tassles or cantle) with my traditional kilts. It along with kilt hose, sgian don't, and flashes completes the traditional kilt look for me. I don't wear one with my Utilikilt. I carry my cell phone in it's own leather belt pouch because rummaging about in my sporran to find my cell phone to only find that I missed the call bugs me.

*The only reason I stick with sporrans is that I have yet to find a Batman Utility Belt complete with proper accessories (Including the infamous Bat Shark Repellent).

Cheers