I'm a keen follower of Susan Slaughter's books (in conjunction with Lora Delwiche) and her Avocet Solutions web site. The web site is very nicely structured and contains a wealth of solid information. Last week, the Little SAS Book Series featured an article about informats and Enterprise Guide 4.2. The article highlighted useful, user-friendly features of EG 4.2's Data Grid, but also warned of the fact that said Data Grid ignores informats.
The site and the article are recommended reading.