EXHIBIT A JOINT FILING AGREEMENTJoint Filing Agreement • December 18th, 2008 • Datalink Corp • Services-computer integrated systems design
Contract Type FiledDecember 18th, 2008 Company IndustryThis Agreement is dated as of December 18, 2008 by and among Mercury Fund VII, Ltd. (“Mercury VII”), Mercury Fund VIII, Ltd., (“Mercury VIII”), Mercury Ventures II, Ltd. (“Mercury Ventures II”), Mercury Management, L.L.C. (“Mercury Management”) and Kevin C. Howe (“Mr. Howe”).