not sure about that...I asked but they said it won't be free... maybe depends on your bargaining power? My friend in Dell said that customers can bargain...not sure if it's the same with compaq tho.

When I called Compuzone they said they'll upgrade to 2gb 800mhx ram FOC

I have to admit the cooling design for this model is poor especially for a laptop with dedicated GPU. The Turion is already hot and with Radeon GPU, the heat is max. The is no proper ventilation for air intake. Only blow out. Normal laptop cooler which blows air under the casing doesnt work well with this model because of no ventilation holes at the bottom unless you open up all the covers.
In terms of free memory under 32bit OS, no difference cos max RAM usable in 32bit mode is exactly 3GB. In terms of responsiveness, expect the system to be a bit snappier although in real life it will be hard to notice because the slowest component is HDD, not RAM.

er, it's a common rule. normally higher clock = faster speed.

since 780G support 800mhz, its a waste if one opted for 667mhz.

IMO, that phrase you quoted weren't even legit.

ah, that thing. different abbreviation, no wonder i haven't heard of it.

almost all of the newer intel processor able to fully utilized DDR2 800mhz thanks to their higher FSB, so UMC factor doesn't fit in (unless you're talking about Pentium D).

RM-70 support HT2.0 so..

667mhz will run at 667mhz
800mhz will run at 800mhz
1066mhz will only run at 1000mhz

yup.

it is guaranteed to run at 800Mhz. noticeable change in real-life experience, not guaranteed.