Today, the USCIS issued an Interim Rule which changes certain policies for H-1b cap filings for FY 2008. The full memo can be found at USCIS link.   

The new rule makes 2 major changes:

1. Duplicate filings by the same employer for the same beneficiary will be denied or revoked and filing fees not returned.

2. The filing period will last for 5 business days.