It looks like the ThinkPad X60s Tablet PC I mentioned previously might be more than a mistake after all. CoreDuoNews, the guys who discovered it in the first place, have now found a French retailer listing the unit for sale (to be available April 6th).
The device is listed for 2140 euro excl. VAT (a little less than $2600 USD) and will feature a CoreDuo T2400 1.83 GHz processor, 1GB RAM, 100 GB hard drive and up to 7.5 hours of battery life. Unfortunately, it looks like the device will still have an XGA (1024x768) screen.
This could be the next must-have tablet - and my next tablet, in spite of the glaring omission of a high-resolution screen.
CoreDuoNews also points out a listing for the ThinkPad X61, although no further details are available.