As well as 8Gig, having a SECOND drive at 7200rpm will help a lot... eSata if you can't install an internal drive
Some ideas for a Laptop Video Editing PC from past discussions
For effective HD video editing, a laptop with the following
-at least the Intel sandy bridge 2720 or 2820 quad processor
-and nvidia graphics preferably the 460m, 485m is a bit much
-1280x900 display with OpenGL 2.0-compatible graphics card
-and 8 or 16 gig ram and Win7 64bit Pro
-and 2 internal 7200 HDDs minimum
I think I have a 2nd space for a HD in my laptop, so that's a posibility. I've got a 7200 rpm HD in another laptop that I'm going to swap with what I have, I just need to grab the 8gb upgrade and another 7200rpm drive. Thanks for the info on the mobile worksations, I'll keep those in mind for work if we ever decide to invest in one.
My next big purchase is a 60d for my own photography stuff, which my computer can handle just fine. After that I'm getting a desktop for video editing. I never plan to do anything major on my laptop as I have a desktop at work that I can use if I need it, I just wanted to figure out what I could do to make the laptop I have work a little quicker with my footage either with hardware or converting the footage to another format/size to make it easier to digest.