I use illustrator to create the scroller, save text as paths then bring it into flash and export as quicktime — that’s the only way I’ve managed to get it right. I export to QT as an uncompressed file (creates quite the file too — 20-30gb!) then use compressor to get it the correct size and speed (It often imports into final cut as a different speed, but that’s fixable)
Trouble is, I can’t include motion or livetype effects in it as they tend to wobble when scrolling.
There has to be a professional scroller available for macs — I did find one, but it was really for home use, even though the author tried to customize it for me, the quality’s just not there.