There is a lot of bad information in this thread. As someone had appropriately corrected someone else, a Celeron IS a Pentium IV. To say that one is a paperweight and another is a V6 or whatever is just WRONG!!!
The Recently released Celeron D has 256K of L2 cache and a P4 core that starts at 2.4Ghz with a FSB of 533Mhz(133Mhz quad pumped). Compare that with the PIII Tulatin which was the top of the line just a few years ago. It also had 256K of L2 cache but the FSB only ran at 133Mhz.
So by comparison, the PIII (which I still use today at 1Ghz for everything from word processing to graphics design) is MUCH MUCH slower than todays Celeron D CPU which actually sells for less than what the PIII 1Ghz sold for a few years ago.
So roughly, you've got maybe 4x the performance at maybe half the price of a PIII which is still powerful enough for the VAST majority of people now a days. The hardware requirements for most software has NOT really increased in the past few years.
IMHO the joke is on the people who spend hundreds of $$$ more on a full blown P4 and hardly if every use ANY of that extra power. It just increases their power bill by functioning as a VERY expensive electric heater!
But hey, instead of paying down their mortgage or contributing more to their childs college fund or whatever they can brag about how great their new P4 3.x Ghz computer is at playing games so at least they bought themselves bragging rights!
To answer the original posters question. Just get Celeron D computers, save your company some money and maybe you'll get a bonus!