To end any speculation, Miami does have Thompkins on it's list of signees.
Along with 7 of his teamates
http://hurricanesports.cstv.com/sports/m-f.../020608aae.html
Marcus Forston* DT 6-2 286 Miami, Fla. Northwestern HS
Jacory Harris* QB 6-4 170 Miami, Fla. Northwestern HS
Aldarius Johnson* WR 6-2 200 Miami, Fla. Northwestern HS
Ben Jones OT 6-5 280 Miami, Fla. Northwestern HS
Sean Spence* LB 6-0 186 Miami, Fla. Northwestern HS
Tommy Streeter WR 6-4 190 Miami, Fla. Northwestern HS
Kendall Thompkins WR 5-10 165 Miami, Fla. Northwestern HS
Brandon Washington G 6-4 315 Miami, Fla. Northwestern HS