The second article also explains:
where your memory is going and why you don't need to worry that it's not showing up as 'free'
why you don't have BOOT.INI any more
how to see startup process connection in Process Explorer so you know whose program is whose
This isn't tweaking information unless you're a developer, but you can see the extra levers and knobs Vista gives developers to twiddle. Plus, understanding some of these changes might give you the confidence to sit back and let Vista manage memory and schedule cpu priorities without trying any of those idiotic tweaking utilities that mess around in the registry ;-)