Following up on the official announcement, I thought I'd write a quick note about our F5+UAG better together;
We recently finished working with F5 engineers on making sure F5 solution and UAG DirectAccess work together.
F5 published the solution guide in http://www.f5.com/pdf/deployment-guides/f5-uag-dg.pdf , and we support that configuration in our UAG 2010 release ,with integrated 3rd party load balancer support for DirectAccess. (Our TechNet docs are located in http://technet.microsoft.com/en-us/library/ee690463.aspx)
I'm really excited to have a load balancing leader such as F5 working with UAG DirectAccess, and I'm sure it will enable UAG DirectAccess customers to enjoy a rich variety of load balancing scenarios utilizing the scalability, reliability, and advanced customization that F5 offers.