Current Linn Lingo vs. older style?

The main difference is that it now uses surface mount technololgy on the circuit board. It also has a full width Linn chassis. The current model started shipping around the first of January '02.

jenmoor, any difference in sound between new and old lingo?

I haven't personally heard them side by side, but the Linny I work with said he thought it was slightly better-enough so that he bought the new one

I recently bought the new Lingo - and listened to the differences between the old and the new.
The new version is definitely much better: better and deeper bass, more definition, more engaging sound.
After a run-in period of several days these effects have, as with other components like the LK 100, even improved!