All 2407WFP are S-PVA panels, there are no 24inch S-IPS from Dell, I think NEC is the only one to make one and it's expensive.
I bought mine in late March from Dell Canada ($649CDN shipped on Dells Days of Deals, woo) and it is an A04, that is all they ship now. It took about a week from the day I ordered to arrive at my door, even though the est. ship date was 2 or 3 weeks from the order date.
RE: 8800 issues, the only ones I've run into are:
1) Flat panel scaling is broken in all 8800 drivers. There is a hotfix that lets you force it on via a registry hack (which breaks HDCP, but that doesn't matter to me right now). The problem is, scaling gets broken whenver you use an app with video overlay (e.g. playing a video file in Windows Media Player) so I have to reboot all the damn time to use scaling for 4:3 games.
2) Lost Planet hard locks on 158.22 drivers. I don't want to fiddle with beta drivers (162.03) so I'm waiting for a new set. Anyone know if 158.27 fixes this?
3) In all drivers I've tried, in TES4: Oblivion, the shader for the oblivion gate clips over all objects (e.g. I can see the distortion from the gate through trees etc. from far away).