[PPCFreak]

One thing to add to the mix on the maximum ram savings. Make sure you set the phone canvas to NOT use the HTCPhonecanvas dll file. HUGE savings when doing this.

Registry value found here:
HKLM\Security\Phone\Skin\
Key: Enabled
Value: 0
(originally set to 1).
Saves me about 15mb.

This does put you back to the Stock WM6.5 style Dialer which is very plain jane but if its really RAM your looking for, this is a must.
One bug right now is with the background image with the smartdialer (I belive this is the where the issue is).
Since the background image is all white and the text is all white, you cannot see the numbers come up as you start dialing. The values do pull up cause if you start dialing, then click in that 'smart dialer' area you will get the first contact that it is filtering for.

Will play around with the image back ground (believe it is stored in the registry settings) to get a grey colored back ground so the white text shows up.