Roush Best place to get mail order tune?

Try JMS Chip & Performance. Those guys over there did the development on the SCT Tuners.
Everyone in this forum will agree that a mail order tune is bad. However, there are ways to get your car tuned over the internet if you can get to a dyno shop and have a laptop/workstation. For example, there were no SCT programmers within 500 miles of my lacation when I began using the SCT stuff. So, this is what I did:

1. Went to the dyno shop and did some runs
2. Immediately e-mailed the results back to JMS
3. They, in return, did some modifications to the tune and e-mailed it right back to me
4. Ran the car on the dyno again and e-mailed my results again

We followed this procedure until we felt confortable with where the car was at.

This is almost like doing some dyno tuning in the sense that the tunes are responding to the current environment conditions in which you are conducting your dyno pulls. This is a good as you're gonna' get without actually taking your car to a shop and getting some dyno tuning done.