Hi Mark,
I have heaps of sharp areas, ie, you didn't notice them until your "new" mouth grows (new tastebuds, xerostomia), and your sensitive tongue. I tend to think it may not be cancer, perhaps a bit of ulceration, mucositis or what ever...just keeping an eye on it. It hasn't bled since, just looks like a small ulceration-ish thing.
It's nice watching your progression in your postscript...jealous, but I'll surpass you...the race is on
Cheers!
Tizz