ADW is another launcher.
I use Advanced Task Killer and I notice my phone runs a little faster. I wish I could stop programs from running on their own (i.e. Voice dialer (I never use that) and several other ones. Every time I open ATK I find apps are running that I didn't even start. This is truly buggin!
download a program called autostarts it allows you to disable apps that you dont want started at certain times (during bootup, after bootup, when bluetooth is connected, etc..), the only catch is you need to be rooted to use it....
Quite a little catch there...