The Eagles will reportedly be hosting Colorado OL Ryan Miller for a pre-draft visit. He's somewhat of an odd prospect in that he's 6-7, but played guard in college. Typically a guy that size would be a tackle. That said, Todd Herremans played guard for several years here at 6-6. Although, he was eventually moved to OT, which is what many NFL teams will likely do with Miller.
Here's his NFL.com scouting report.
There will be discussions whether or not to move Miller outside to tackle or keep him inside at guard, his primary college position. This debate revolves around Miller's size, much like last year's first round pick at OT, Nate Solder. Given Miller's solid athletic ability and size, a move to the outside seems imminent. Miller would need to learn the position after spending the past two years inside, but he could transition well with his talent and versatility. Look for Miller to be selected early on as a result of his size, athletic ability and versatility on the line; he could go as early as the late first round, but most likely will settle in nicely in the second round.
Frankly, I'm not sure where they got "late first/second round" value on him. I've seen him mostly as a middle round target. One final interesting note is that he actually went to Columbine High School.