I just ordered a X41 tablet and was looking for a possible solution for the HD low speed problem.
Have you seen this CF to 2.5" IDE adapter?
It seems to be very short and cheap. I think it fits in the HD bay.
A CF card is not to expensive as a SDD HD.
The problem i guess is that HD FW check that some Thinkpad laptops has.
Any idea if it will works?