QUOTE(YuAndDan @ Jul 17 2007, 11:59 AM)

K-1 is considered "Work Authorized" for the 90 days of the I-94, after that they need EAD or green-card to continue working.
Actually, they need an EAD to work the first 90 days aswell. They can't just come over and work with just the K-1 visa only. The only POE that issues the temporary EAD at the moment to K-1 visa holders is JFK.