"..just waiting for intel native apps.."4.0 starson by evil_dracula
Pros: exceptional power, speed and design
Cons: MS Office, Adobe CS & Macromedia Apps are not intel native
Summary: If you work in an environment in which you need to access an exchange server and you use a mac, you'll likely be using Microsoft's Entourage as a mail client.
Entourage, like the majority of major third party apps are not yet optimized for Apple's new intel-based machine, making it a less-than-optimium choice for some users at this point.
The same is true for the popular Adobe application suite unfortunately.. so designers.. keep your G5s for now. The photoshop performance on these intel macs is terrible (about equal to a G4) and crashes have been known to occur.
My advice, if you don't use photoshop, illustrator or the other adobe apps and you can get by with Apple's mail application (which isn't half bad) - get over to the Apple store and grab one of these.. If, on the other hand, you need design productivity - hold off until Adobe makes the switch.