I had this guide on how to publish SharePoint with Forefront UAG in draft mode but as it turns out Microsoft just pulled the plug on UAG. As of July 1st 2014, UAG wont be available for purchase and mainstream support ends on April 14th 2015. It is unclear as to why the product was killed but Microsoft now recommends using Server 2012 R2 Web Application Proxy for your publishing needs. The windows server feature is nowhere near as good as UAG and it does require federating any applications you publish with ADFS which means more servers. Luckily your UAG license now gives you an additional Windows Server license for your needs. I will be publishing a guide for the Server 2012 R2 Web Application Proxy pretty soon.