If being N tier is a prerequisite, it's gotta be VFE. They are also working closely with Web Connection for web based apps and Stonefield fits very nicely also. A common myth is that you have to do things "their" way. That's not true. You can mix and match as much as you like. Great product, with excellent support and many knowledgeable users.
John Harvey
Shelbynet.com
"I'm addicted to placebos. I could quit, but it wouldn't matter." Stephen Wright