Here's a small quote from the article released recently at his site:
All fields in Maya are unique. A thorough understanding of each field's behavior is a crucial first step towards an artist's ability to efficiently and effectively design a dynamic effect. There are two fields, however, which are commonly thought to yield identical results: Gravity and Uniform. While similar, they have an important difference: how they deal with mass.
It's a good read for those confused about the difference between these 2 fields
Check out the SIMPLYMAYA tutorial links database for the link to Gnomon, then find thier free section for the article.
Israel "Izzy" Long
Motion and Title Design for Broadcast-Film-DS