AMD has not yet started yanking pins on their processors, IAFAIK. the latest (august/september) AMD datasheets do not indicate that the pins are yanked...check out the
Athlon PGA document from athlon. overclockers.com (no affiliation) is also saying that all of the late-week CPUs that they've seen/heard about are not mising pins.
note that it does appear that there are pins missing from the pin array (there are some missing at regular intervals); that is normal. check out
these pictures at the review-zone (no affiliation); these are what the PGA should look like. If the L1-bridge-associated pins were missing, there would be a clump of 4 pins missing from (you guessed it) right under the L1 bridge.
Even if those pins were missing, you could OC the hard way: adjusting the L2-7 bridges by hand. Toms' hardware has shown how to do this.
so, the rumor is false. IMHO, AMD probably wont ever resort to pulling pins like that.
btw, no affiliation with AMD (or anyone else for that matter) either.
(edit: oops, jacked a link)