I looked through several other posts about pricing, but I didn't see anything about tipping.  For a "normal" massage, I typically tip about 20% of the cost of teh service.  Does anything like this apply to "other" services?

on any message board.

find you go 90 180 days you find a ton of posts about tips

I think it's covered in the newbie manual as well

I think tipping is strictly up to your own discretion, so give whatever you feel comfortable.