Spotting

That's the problem with common names- they don't often make sense and can refer to different species in different places. The only long-legged spiders I know of in Oregon are Cheiracanthium mildei (Longlegged Sac Spider) and Eratigena agrestis (Hobo Spider), but I can't tell you if it is either of them with any certainty. If you post this picture on BugGuide's ID request, I bet you will get some good leads. http://bugguide.net/node/view/6/bgimage

I suppose I should have been more clear -- the only thing I've heard called daddy long legs are cellar spiders, which shared my basement with me as I grew up. On Wikipedia only, I've seen that people call crane flies and another arthropod daddy long legs, but I've never actually heard anybody do that. So I was asking if this is a cellar spider because of the very long legs; however, it's legs were much thicker than any daddy long legs I've ever seen.

This is a true spider, not a daddy long legs.