I've recently begun using my MBP as a near full-time desktop replacement. Unfortunately, the poor thing just can't keep up. To give you an idea of what's currently running: Mail, iCal, Safari, iPhoto, iTunes, Excel, VMWare Fusion (XP), Firefox, Photoshop Extended CS4, Dreamweaver CS4. I'm hoping I might be able to help it along a little bit if I add more RAM. The model identifier is 5,1 - it's a 2.66GHz with 4GB currently, but I'd like to replace at least one of the 2GB RAM sticks with a 4GB. Can this baby take 6GB or 8GB total RAM? Outside of increasing RAM is there really anything I can do to improve performance? Do you think any of the coming models in January or June would likely provide noticeable improvements?