incrediBILL - 1:10 am on Aug 14, 2013 (gmt 0)
FWIW, not knowing what your site does, Google recommends a single RWD site, not a separate site for mobile so if you can just make your code change it's appearance for mobile and not redirect, the way Twitter Bootstrap does, you might find life a bit easier.
nightmare of cross-browser testing,
Here's the big problem with mobile, there are TOO MANY BROWSERS!
Chrome, Dolphin, Firefox, Opera, etc. but the only saving grace is Apple webkit being common among all of them and those that do something different these days is a why bother.
Plus WHICH version as Android phones are always being abandoned so you have people running ancient stuff on Android 2.1 (or worse) or the current stuff on 4.3 that I'm now using.
Not possible to test everything but the most current Android and iPhone so since almost everything except Windows 8 uses Apple Webkit I don't really bother with the full blown testing of everything as there are simply too many things to test. Does it work on both iPhone and a Galaxy or Nexus 4? iPad and Nexus 7? Done.
Often I find I don't even care about Apple stuff and just test Android these days except for a cursory glance on the iPhone now and then unless people send in complaints.
That's why we do a beta period and let users do a little of the testing :)