A while ago Tom's hardware did a series in a solar powered PC... many of the power saving decisions sound relevant to your requirements. The article is still available at http://www.tomshardware.com/reviews/hardware-components,1685.html

Hmmmm - so a programme has gathered email addresses from web pages, and sent inappropriate messages to them. That sounds like spam to me... just report it to the BSAs ISP - they may be violating the terms of their service agreement :-)

Cheers -- Dave.