Here is my chechlist so far...please tell me if i need to add more
 Upgrade to 2GB RAM
 Get A Direct X 10 supporting video card, with 256 or more memory
 POSSIBLY upgrade processor to a dual core with 3.0 GHz or more
I think we're all wondering if we should "add more" to our systems. Wish I could be of help, but let's wait till October. You'll get plenty of info then!
That would be enough, but like I always say, WAIT until FSX comes out and SAVE SAVE SAVE!!!!