I want to drive cross country - but don't have a car! Can anyone recommend an organization, or website where a twenty-something professional can find the same in a roadtrip buddy- preferably one with a car?

check out www.lonelyplanet.com. There might be something there for you.
Good luck!!

Thanks Carla. I just found lonely planet and posted a few announcements. Unfortunately, I didn't find anyone with my plans. I did find someone, however, also wondering if there were any ride-share websites. It seems like it's a need to be filled.
Any more ideas?

www.frommers.com has a Travel section devoted to "Special Travelers". Thought I saw one about people looking for people type thing.

Check out www.autodriveaway.com. You can drive someone else's car to Colorado.

I am driving from Riverside CA, to Manchester, NH,,,,,,travel dates are: Leaving Riverside CA on Dec 3rd, to Dec 10th,2011 stopping at Grand Canyon, then on to Manchester NH. I have one seat available, in a 1982 Datsun 4WD Kingcab pickup truck. A driving companion would be nice. Non-smokers only. Contact me at [email protected], Thanks.

Have you tried http://www.erideshare.com/?

One place to look if you are flexible is at a college near you. There are often kids looking for an inexpensive way to get to/from home and willing to share a ride.

Ah, reviving a 13 year old thread!

This may be the oldest thread I have ever seen revived...

wow-- I did not notice the date of the OP. But it's nice of Alan to offer.

Well since this "20 something" is probably 40 years old by now hopefully he made it cross country already!