a good source for the latest prl's is here:
http://www.corolada.com/prl/
there is actually a 60711 out now, I've been using it here in san diego for the last couple weeks; seems to work as good as 60611 did for me.
to change it, for sprint its ##775# then enter your MSL to get in. browse for the prl file in the My Documents folder- think thats where it looks for it by default.