In the chart I've posted below there seems to be a dominant weekly cycle period of just over 13 weeks (13.016), double this is 26.032 weeks which is close to what Tim calculated (26.286).
The nominal 26 week hits 3 weeks from now
I also found a good fit using the 5X multiple, or 65.016 weeks. This should hit in the first week of January 2009. (Tax loss selling)
The span of 57.75 weeks is a bit rougher in the overall match accuracy but hits this week and is symmetric with the July 2006 - Aug 2007 lows.
Also marked on this chart are the retrace levels for the entire move since the 2002 low. With the markets under stress, a 50% retrace to 1172 seems highly likely with a very good chance the 1150 area will be penetrated as well.