Good questions, and welcome to the world of white tea!!! To start off, there are no set temperature guides to white teas. Most steep within the range of 150-180 degrees, but it varies by type, so you will have to experiment a little.
As far as neat gadgets, I use adagio's utilitea:
http://www.adagio.com/teaware/utiliTEA_ ... 6327fcbfdf
It does all temperatures from 140-212. You will have to use a thermometer once to detemine where the different temperaures are, but once you do that, you will be set for life.
Adagio is also coming out with a new trinitea soon:
http://www.adagio.com/teaware/triniTEA. ... 6327fcbfdf
The new trinitea will feature variable temperature controls and it will be an all in one tea maker.
Hope this helps.