Call of Duty: Modern Warfare 2 PC Free Multiplayer Trial Weekend Announced
Valve says players looking to give Infinity Ward's monster-selling shooter a whirl can already pre-load the client directly through Steam by clicking this handy little link, though at the time of writing it seemed not to be working.
The free weekend will begin on Thursday, April 8, and presumably run through Sunday.
From The Chatty
"Free multiplayer weekend" makes it sound like multiplayer is usually paid-for. Not sure how else to phrase it though.