Originally posted by: mechBgon
Of the chipsets that support the socket-478 Celerons, you could choose from any of the i845 family: i845, i845D, i845E, i845G, i845PE, or i845GE. The models with a G have onboard graphics. i845 and i845D support only 400MHz-bus CPUs such as the older Pentium4's and the Celerons. The E, G, PE and GE models support both 400MHz-bus and 533MHz-bus CPUs. The PE and GE models additionally support Intel's soon-arriving 3.06GHz Pentium4's and beyond, with power circuitry designed to handle their demands. I would think i845E sounds like a good compromise that leaves an upgrade path open, and i845E boards start in the low $80's. Just beware of the i845GL and i845GLL, which have no AGP slot at all.
Have you considered a Celeron 1.3GHz? The performance of the Pentium4-based Celerons such as the 1.8GHz is very poor in some types of applications, such as games, to the point where a 2.0GHz Celeron that was overclocked to 3.0GHz was only about the same performance level as a 1.6A Pentium4. Ouch!

The Celeron 1.3 is basically a Pentium3, much more powerful per MHz. If you're open to the idea of a 1.3GHz Celeron and a VIA-based board with onboard video plus an AGP slot, check out this combo deal, which includes CPU with retail heatsink/fan, 256Mb Kingston PC133 memory, and the motherboard: (edited, I picked the wrong motherboard... hang on a bit)
Or Mwave has bundles with Intel-branded i815-based boards, although i815 has a 512Mb RAM limitation that you should be aware of (if that matters).