Hey Oeri, hope you don't mind all the bugs I've posted, I had a lot of chances to test with all the driving I've done over the holidays. Overall Freeway is great so keep up the good work!
Oh, and one more thing :P
I don't know if it is true, but it appears that the labels in Freeway (song title, etc..) are updated before mplayer is updated. Sending the command to mplayer first (or at least sooner) may make the overall transition seem quicker. Again, this is just how it looks to me, so if it can't be changed, nevermind.