Obama came to fame from that speech, but he was still in office and notable. What has Ridge done? Really, Ridge's best chance was 2000. He was in office as long as Bush was. 2004 if Gore had taken office? Maybe, if Romney and Huckabee could run in 2008 and be serious. 2008? Can anyone see him getting anywhere? Fred Thompson was out of office as long as I guess and he could've been a serious candidate if he actually tried, but he was filling a niche that Ridge obviously couldn't (A "true conservative".) 2012? Now he's beyond washed-up.
Since when is it required that a nominee currently hold an office? He' served in Congress for like 12 years, governed a large state, and headed DHS as recently as four years ago. He also held a significant position in the McCain campaign last year. I don't nominating him would be pathetic at all. He'd actually be one of the more experienced and accomplished of candidates.