jrichker - as an aside - my IAB/ecu does that with no VSS; so I'm not sure what's up with that.
Diablo - if you have a VSS there should be two computer harness connections on the tranny. One is near the front and it's the neutral indicator connector. The other is the VSS - it's on the same side as the neutral switch, but further back on the tranny.
Just crawl underneath (driver's side) with a light. If the speedo cable plugs straight into the tranny, then you don't have a VSS. If there's a device with an electrical connection on it in between the tranny and the speedo cable - that's your VSS.