I'll have open a large pages document, powerpoint, adium, preview, safari, and sometimes iTunes w/ absolutely no lag. Like others have said, not enough people give the Air credit for its performance...it's not "crippled" like many think, it's actually pretty fast. Remember - it has a dual core processor and 2 GB ram. The bottleneck is the slower hard drive, but even then, it's not BAD like people think it would be.