Never count on a BIOS update fixing anything. Thinking that a BIOS update will allow a processor that isn't even in production yet to work on a presently available board is not very wise.
As an example, a bunch of people bought IWill KK266 boards at the recommendation of Anandtech and we were assured by IWill that a BIOS update would allow proper operation of "upcomming 1.5Ghz+ AMD Chips" (This was before the XP was out). The BIOS update did arrive, but it did NOT allow proper, stable operation with an XP processor. About 80% of users seem to report that the XP does not work properly or reliably, some can't even get the board to POST. Do not buy a board today and plan on putting in a processor that hasn't even been made yet...