<< Is the battery life really 15 minutes? >>
No, but it's going to be pretty damn short. A desktop Northwood @ 2.4GHz running at 1.5V without the benefit of SpeedStep is going to be eating up battery life pretty quickly, not to mention it'll be difficult to adequately cool in such a small environment.
<< Alienware seems to be promoting the Area-51-M as a replacement for a LAN system, rather than a notebook that you would bring onto an airplane. >>
Perhaps, but their still passing it off as easily portable and great for use anywhere...
<< From LAN parties to business meetings to classroom lectures, this system can go virtually anywhere. >>
.
In any case, personally I find it the notion of a processor that dissipates an average of 60W in a notebook a ridiculous prospect to say the least.
<< why doesn't this thing have a geforce4 go? >>
Perhaps they wish to use save battery life?
In which case it makes singificant sense to use the R7500 Mobility over the GF4 Go considering performance seems to be close enough that who holds the lead jumps back and forth depending upon the individual benchmark and whose doing the testing.
But then, I somehow doubt their particularly concerned about battery life judging by the processor in use.