i saw this post over on the ISA/TMG blog today

http://blogs.technet.com/isablog/archive/2009/10/05/forefront-tmg-isp-redundancy-feature.aspx

This is something that customers have been asking for ages. Being that i havent been following the featureset of TMG closely (im waiting for it to at least hit RC until having a play) i was excited to see that this is finally part of the product. I’ll be most interested to see how its actually implemented and how well it works.