Here's the response I got from Delta regarding whether matches will be granted after June 30th.
At this time, the "Other Airline Status Match" promotion will expire
June 30, 2007. We do not have any information indicating the promotion
will be extended beyond that date. If credentials are sent now, before
July 1, 2007, members receive status through February 2008. There is no
information indicating the program would extend matching beyond February
of next year.