My new Mac Pro has the stock 2GB which I'll probably upgrade after a while, but I'm in no hurry. Gotta pay off my credit card bill for the Mac Pro first. 😛
Actually after I have loaded the apps up that I use I have about 800mb free so everything is in ram, there isn't as much disk thrashing and flicking between apps is sweet and quick 🙂
I do a lot of Imovie stuff too so skimming through HD clips is nice.
I figured the cost of the ram at the time was a pretty good long term investment, so I should be happy for a fair few years.