http://www.nuerom.com/BlogEngine/pos...cClock-13.aspx
Does what nueClockControl does, just in an automated way - hopefully it'll increase your battery life without too much of a hit on performance ... let me know how it works out for you, and consider making a donation if you find it genuinely useful =).
update - version 1.1 has tons more features and hopefully less bugs.. do check it out...
another update- version 1.2 fixes a minimum speed on boot bug some people were experiencing
1.3 - fixes slow clock change issue