Sliquid H2O: Less lasting than Ye Olde Astroglide, but none of the irritation for us sensitive types. It doesn't gunk up during use, and it leaves no residue behind when it's gone. Personally, I found that it works better when I'm flying solo with my toys than it does during sex. Unfortunately, it just doesn't last well at for sex, leaving us reapplying over and over.
Sliquid H2O is a good answer for those with sensitive genitalia. None of the ingredients are known irritants. (That doesn't mean they can't irritate you. Trust your body on this one: if it hurts, stop.) It isn't the be-all end-all of sensitive skin water-based lubricants, but it's decent.