I´ve been helping people on isaserver.org message boards since 2008 and I´ve seen a lot of requests for ISA features.
It is well know that TMG introduces great features and cover most of the requests. Some time ago one member of www.isaserver.org message boards asked for a feature to search access rules. Even though, ISA team did a great job organizing rules by processing order, it is hard to find out a specific rule if you have hundreds of rules setup for your environment.
Thinking about that TMG Beta 3 got a feature to cover the community requests!!
Yuri Diogenes is a friend of mine and talks about it on his blog, highlighting why TMG is even more easier to manage comparing to other ISA versions. It´s worth to take a look: