NTONYX offers a program, "Style Enhancer" to add expression and style to your midi sequences. Listen to a SAMPLE BEFORE and AFTER of the same midi sequence.
--NEW-- Check out their Pattern Variator too
Note: I've used this program on some of the instrument parts in my recent sequences and am quite pleased with the programs'ability to make the instrument parts sound more as if they are being performed "live". They add phrasing, subtle dynamics, vibrato and other controllers to the file in a way that make the sound much more realistic. --Cliff Odenkirk