Just cruising the DigiKey website, and I happened to come across three listings matching AVRISP:
ATAVRISP -- "PROGRAMMER AVR IN SYSTEM" -- $29.00
->the classic AVRISP, marked as "non-stock"
AVRISP mkII -- "PROGRAMMER AVR IN SYSTEM USB" -- $42.93
->the obvious choice for the mkII. Disappointingly expensive. Also marked as "non-stock". Perhaps a clerical error? (read on...)
ATAVRISP2 -- "PROGRAMMER AVR IN SYSTEM" -- $34.00
->This would be akin to the naming scheme that is actually used to differentiate the JTAG ICE from the JTAG ICE mkII in DigiKey's books. Marked as "out of stock" with an estimated ship date of January 17.