My girlfriend and I are in similar positions. We are PM for 2002 but didn't do much flying this year (not nearly as many good airfares as last year). I had read some older posts that said Delta would only drop you one level per year, which would mean we might get a comp to Gold for 2003.
Just in case though, I did an ATL-CVG-PHL routing on the way back from our last scheduled trip this year (instead of direct ATL-PHL) so we'd have enough miles to officially qualify for Silver.
Jeff