I felt the same exact thing as you did - no feeling at all. I'm now on my 4th month and I seem to have more feeling in my fingertips. They seem to be more "normal" as they once were. They also seem softer again. But the calluses are still there as I can now play a lot longer without feeling any pain.

I've also heard that once you get your calluses, you pretty much got 'em for good. Is this true, or would you have to start from scratch if you stop playing for, say, six months?