The producers and SAG (Screen Actors Guild), which covers Lost and nearly all of primetime TV)), announced Wednesday (link) that they would resume their negotiations for a primetime contract in less than two weeks, on or before May 28. These negotiations had been halted May 6 (with SAG protesting that a deal was close, link) when the producers switched tracks to begin negotiations with the sister actors union AFTRA (American Federation of Television & Radio Artists), which today continue their 9th day of negotiations.
By May 28, the less-demanding AFTRA is expected to have hammered out a contract, and SAG can begin. Whether or not a strike come June 30 is likely is still up in the air, but the planned resumption of talks can only be good news, as Lost Season 5 is slated to begin production late this summer. If you're just learning about this news, you can catch up with our summary here.