cfnm - Jay does not keep sites listed forever (unlike GG). Most listings last around 6 months.
The reason is people changing their sites after months of being listed, and the programming involved with catching changes.
While I'm sure you aren't changing anything, a great deal of others do. So there is simply a time limit of listings.
If a particular site has been dropped, feel free to resubmit.
You should have received and email today though
