Ultra 20 dual-core upgrade: when and what?

Does anyone know when Sun will make a dual-core upgrade kit for the Ultra-20s available? From what I understand, it shouldn't take much more than a new processor and some BIOS changes.
[206 byte] By [tmnelson] at [2007-11-25 22:38:23]
# 1
Call Sun, the only CPU related CRU currently available is the fan/heatsink!
mlennon at 2007-7-5 14:08:40 > top of Java-index,Sun Hardware,Other Sun Hardware...