From today's Post-Gazette:
A source close to Seattle's front office confirmed last night that the Mariners have persisted in their months-long effort to acquire outfielder Craig Wilson and that the return being discussed is Joel Pineiro, who could fulfill the Pirates' wish for an experienced right-handed starter.
Other teams remain interested in Wilson, too, but there is a general view that, if no deal is done by this weekend, there will be none for quite a while.
Link: http://www.post-gazette.com/pg/06089/678008-63.stm