AMA National Number

This is a great one for the nerds (like me) out there. If you ever wonder who held number 5 in 1966, you go to amanationalnumber.com, type in the number and then view the results (Larry Palmgren by the way).
It also works for years and names, so you type in a season and it tells you all the national numbers from that year, or you type in a rider's surname and it gives you the number they ran. Genuis! G