I did make a template credit roll. The truth is that if you want sharp titles, there are only 2 speeds you can roll at. If you want them readable, only one.
I made a fcp template awhile back with a photoshop file and a fcp project. Just change the text in the ps file and bingo you have a perfect credit roll in the fcp project.
http://bretwilliams.com/cowstuff/croll.zip