Here’s a great article from Dave Stagl on the love hate relationship of using gates on tom drums.

With summertime in full swing and a holiday weekend, we had slim availability for our musician core.  We were able to field a small but very capable lineup for the week with Bill Hunton on acoustic, Roger Hiles on keys, and Mike Dooley on drums.  Megan Sullivan and Ray Hilton took on the vocal pieces, [...]

Here’s a really helpful article on dealing with on-stage amps, and fitting them into the house mix.
http://www.churchsoundguy.com/2009/06/miking-rock-guitars-live-timeless.html