Well, I've determined that any of my "why does my battery sometimes drain quickly, other times not?" has come down to Wifi being turned on or off (I believe automatically because of locale).
I've now just simply turned it off at all times, and if I ever need it, I'll simply manually enable or disable it. Now, here's my question :
Is Wifi ever really needed? It seems 3g works fine, speed is fine, streaming audio is fine... why woudl I go Wifi unless I'm in a place which offers it free and fast, and have it plugged in? Even then, if I just used the 3g network everything seems to work great too.
Any pros/cons other than turning wifi on for a little more speed?