The impression adobe flash based typography can make on your clients is often under estimated and seldom used by small-mid tier firms.

Often this is because the cost of a flash animations and graphic designers can be prohibitive. 

Wikipedia defines Typography as the art and technique of arranging type in order to make the language it forms most appealing to transparent learning and recognition. In this sence Typography is a great marketing tool.

I have experience using a number of programs to create animated text, including Final Cut Studio's Livetype and Adobe After Effects.