I'm in the "either sounds fine to my ear" camp, and the position of my hometown on this map reflects that. It's interesting that there's congruence between the "on line" and "either" groups, but not "in line" and "either".
When I was a kid my mom used to take me around to the tag sales in the area. Apparently "tag sale" is a pretty specific indicator that one was raised within a 50 mile radius of NYC. Out here in CA, they're usually called 'garage' and 'yard' sales.
I'm pretty into in-line skating, and with ski season coming I pulled them out of the garage a few weeks back to rebuild my stamina and work on my slalom turns.