OK, I answered my own question. When I saw reports of people who had submitted their applications in October having their checks cashed, I went home and checked on the status of my check. Here are the details:
N-400 mailed to CSC: 8-20-07
N-400 received: 8-21-07
Check cashed: 10-29-07
Receipt date: waiting
Looks like CSC is now focusing primarily on receipting the N-400 backlog they received in the summer. Also looks like they are moving fast, which is a good sign. Hopefully, the receipts are not too far behind once the checks have been cashed.
If anybody who applied at CSC and recently got their checks cashed has received a receipt, could you please post your particulars here so that we can continue to track.
For those of you at other service centers, I think this is good news for you as well. What it means is that as soon as the service centers re-allocate their resources to N-400 receipting, the frontlogs should start to clear. As for the impending backlogs with other parts of application processing, I think that all of us that applied in July and onwards are in for a good long wait. Santa Ana used to be tracking at about 5-6 months total processing time, but I expect that number to go up. The only good thing to come from all this is that the district offices have had some time to get ready for this impending tidal wave of interview candidates. While planning is not USCIS' strong suit, it is my understanding that contract workers at some of the district offices have been asked to stay on to help deal with the flood of applicants (read this some time ago in the LA Times.)
Good luck to everyone and please keep posting on your progress. Just as we on this forum all got through the GC process together so too will we get through the citizenship process by helping each other out.