TweakVista
http://www.tweakvista.com/

The How-To Geek
http://www.howtogeek.com/tag/windows-vista/

TweakGuides Vista Tweaking Companion
http://www.tweakguides.com/TGTC.html

TweakGuides - Vista Annoyances Resolved
http://www.tweakguides.com/VA_1.html

Top Ten Tweaks - Chris Pirillo
http://chris.pirillo.com/2007/01/20/top-10...-windows-vista/

Vista - Tips, Tricks & Tweaks
http://www.neowin.net/forum/index.php?showtopic=499870

The WinVista Club
http://www.winvistaclub.com/tips.html


BlackViper - Vista Super Tweaks & Services Guide
(incl Vista Services Control - a great site)
http://www.blackviper.com/WinVista/supertweaks.htm

Speedy Vista - Services Guide
http://www.speedyvista.com/services.php