The Detroit Lions came into the 2011 NFL Draft with six total picks. Three of those picks were set to take place during the first two days of the draft, and that's what ended up happening. They were set to have three picks on the final day of the draft, but because of the trade to get back into the second round, the Lions will actually enter day three with only two selections:
Round 5, Pick 26 (157th overall) (From Baltimore via Seattle)
Round 7, Pick 6 (209th overall) (From Cleveland via Seattle)
The picks the Lions have already made are as follows:
Round 1, Pick 13 (13th overall): DT Nick Fairley (Auburn)
Round 2, Pick 12 (44th overall): WR Titus Young (Boise State)
Round 2, Pick 25 (57th overall) (From Seattle): RB Mikel Leshoure (Illinois)
Basically, the Lions spent a fourth-round pick and lost a few spots in the fifth and seventh rounds to turn their third-round selection into an additional second-rounder. Barring another trade, they will finish the 2011 NFL Draft with five total picks, two of which will take place today.
For more coverage of the 2011 NFL Draft (i.e. NFL mock drafts, draft projections, scouting reports, the full NFL Draft schedule, etc.), check out Mocking The Draft, SB Nation's NFL Draft hub, SB Nation Detroit's NFL Draft StoryStream and Pride Of Detroit's 2011 NFL Draft archive.