The Mobile 6800 is due in sometime in November in at least one Clevo (Sager) model. Hopefully, once Nvidia makes the official announcement, we'll hear about more design wins.
The Mobility 9800 is X800 core based (many articles have confirmed this). So no, it's not 1.5 years old. It's just ATI's weird naming scheme again (just as the Mobility 9700 had no relation to the desktop version). It's trivial for ATI to make a PCI-E version of the Mobility 9800 and call it a Mobility X800. I guess that's the reason for the misleading name...so the "X" in Mobility products will mean PCI-E.
I'm expecting to hear about the Mobility X800 before the end of the year. Especially if Nvidia does announce the 6800 Go in November, I'm sure ATI will want to show they have a competing product. I would guess we'll see the Mobility X800 in the next generation Dell XPS, but I don't know if that will be released before the end of the year.
There's also a very speculative rumor of a possible 12-pipeline Mobility X800 Pro, which probably wouldn't appear until quite a while after the standard 8-pipeline Mobility X800. I have no idea if that's true.
I have seen mention and benches of a Mobile 6600 Go and I would guess ATI may have a Mobility X700 up their sleeve too. I don't expect to see either of those until early next year after the high-end flagship mobile GPUs are released. I'm guessing those two chips will be power conscious, mid-range successors that will find their way into Alviso/Sonoma next generation Pentium-M notebooks. Maybe we'll see those in February-March.
Anyway, we should at least hear official announcments of the mobile 6800 and X800 within the next couple months. But remember, the power and cooling requirements of the highest end cards mean they will only be found in bigger, heavier P4 and A64 desktop replacement machines. I highly doubt we'll see either of them with a Pentium-M (unless it's a big, desktop replacement-sized P-M).