Yes, the KT333 mobos seem to be the ticket - avoiding the 'wrong' versions of course. I have a KT133 mATX board with ISA slot running a Duron 1100 and goes pretty well and has front USB headers which is nice. It was my Glide box for quite a while until I assembled the current VA6/P-3 Tualatin system which seems to outpace it [certainly the 1400, but still working on that].
But also in the parts bin are an Athlon 64 4000+ and a x2 4800+ so naturally I've started "wondering" if there was a mobo with a 3.3v AGP slot that could handle these...
Years ago I got caught out in the cold with my V5 when I upgraded mobos thinking the AGP slot would work so I got familiar with the AGP compaibility situation myself - and it's still a bit confusing..
Thanks for the hints all.