I checked in on my submitted hours and was pleased with the pre-approval process. The GCBI confirmed that they are retroactively reviewing hours and mine were completed less than a week after the announcement about pre-approval.
One note: I'm currently communicating with the GBCI on some of the LEED-Specific hours from Greenbuild 2010 (listed at http://www.greenbuildexpo.org/files/GBCI-Specific-Sessions.pdf). Live presentations are not eligible for LEED-Specific hours as noted in the CMP guide and by the pre-approval review of my submitted hours; however, there were sessions listed as approved for LEED-Specific hours at Greenbuild. I'll post a follow-up comment with the resolution on this.