Erik,
Wise move on your purchase, use any extra money and getting the full 4GB.
I have the last generation 2.0 DP and this is my first Mac. I too was worried about what I was reading, mainly all the "Beeping" noises, etc...
I have not had one issue I routinely do FCE, iMovie, > 11,000 iPhoto, etc...
I did fully pop the machine to 4GB and everyone here says get the 8 slot memory stick if you do that. Well I edit (usually 1 hour) videos to burn to DVD and I have yet to really have the machine use more than 2GB of RAM at any one time. I'm talking about "Active".
For example, right now in the background I'm doing a iMovie of home video, it's an hour long. I have the following memory stats (while rending in the background....
Wired: 252.91MB
Active: 1.46GB
Inactive: 2.25GB
Used: 3.96GB
Free: 41.38MB
Seriously, unless you are a professional, 4GB is plenty now-a-days and the editing is very responsive and works great on a DP 2.0.
Also, this is my first Mac ever (since June'ish) and I can't believe it took me so long! I'm a 100% convert now. I just have to figure out how to get my wife let me convert the other 10 or so PeeCee's we have in the house to Mac. 😉