During the last advert break of the season 4 finale of Lost, an advert was shown about a company called Octagon Global Recruiting, see below.
It is to be assumed that this is part of the new alternate reality game that goes on between seasons of the show. The advert states that the company will be holding a recruitment drive between the dates of the 24th to the 27th of July and will be held in San Diego. As many of you are aware, the San Diego Comic-Con will be held between those dates.
I myself went on to octagonglobalrecruiting.com and there you could register interest by entering an email address. I did this and yesterday, June the 19th I received an email from them. The contents of the email can be read below.

Comic-Con is only a little over a month away and I’m excited to find out what this all means. Though I think in season 5 we’re going to be learning a lot more about Dharma and I’ve been waiting a long time for that.