You have a really good point. This might be a bigger need than it looks on the surface. We haven't seem much of Long, and there is just about no depth to speak of. Neither Donte Deayon or Tyrique McGhee appear to be challengers for any kind of playing time. I would guess we'll draft one and probably bring in a second wave free agent vet.
For what it's worth, we've had known pre draft visits with 3 CB's: Thomas Graham Jr.(Oregon), Asante Samuel Jr., (Florida State) & Darren Hall, (San Diego State). Graham is projected as a 2nd-3rd round choice, Samuel a 1st. Samuel seems unrealistic without trading up. That might be true of Graham as well. Hall should be available in the later rounds. (I'm no draft guy, I'm just going by what the internet says)