Honestly, your best bet is probably to farm it out to a professional company that can make stamped disks if you need to make that many.
If you insist on doing it yourself, I believe Nero can burn to multiple drives at the same time... but even if you burned to, say, 8 drives simultaneously at 48X speeds, you're talking 5-6 hours (at least) of sitting there and swapping disks to burn 1000 CDs.