AMD 1700+, its clock speed (no OC) is 1467 Mhz, 1 gig RAM, 278 sec with Opera and other tasks active.
When I have time I'll rerun it without other tasks active, no Zone Alarm, no internet connections and so on, and I'll repost my times (and I think we all have to do this).

Now some thoughts.

As far as I can see, the main speedup is the RAM, not the CPU (if you don't compare an AMD 1400 to a P4 3.06, obviusly...); from 2.0 Mhz up, rendertime with 1 or 2 gig RAM is consistent with minimal variations compared to the variations of the CPU speed.
Additionally, RDRAM isn't a greater speedup in respect to traditional DDR RAM, even if only one tester stated he had RDRAM (and he got one of the worst times in the 1.4 Mhz class...).
This means: if you can buy a P4 or a AMD 2.4 or 2.6 that costs 100 $, buy it against a P4 3.06 that costs 300+ $ (even 500 $ here, around 480 euro), you aren't going to lose so much speed in comparation to the much less money spent...same goes for RAM, don't buy the much more expensive RDRAM and chipset which support it, it's only a marketing issue :-)

And for the professionals who use highend 3D apps? Well, it's another story: 3DSMax and Lightwave, only to talk about these two, take great advantage from the fastest FSB of the new P4s, and if you can afford a dual CPU system go for it, according to what I've read these apps run almost 1.5-1.8 times faster than traditional single CPU systems...
Poser uses only 1 CPU though, so don't run to the next store if you are going to render a simple NVIATWAS :-DDD

The MACs, sorry to say that, are great for other jobs, but NEVER GOT A MAC FOR 3D RENDERING!!!
I have evidences that the biggest and powerful MAC is outraged by a simple 1.8 Mhz Intel CPU, you can see some threads at http://www.cgtalk.com (search for "Cinebench"): I'm speaking of triple or quadruple (and even greater) scores for a average Intel based CPU against a powerful MAC...check for yourself.
Apple is launching the next G5 generation of CPU, and the testers are stating it can outrun even the 3.06 P4; but the price tag is going to outrun the one of the highend P4 systems, too...
Please don't take this as a war flame Intel/MAC, I'm only reporting what I've read about.

Ciao, Luca