I have been checking out the new responsive themes by NimbleHost, Elixir Graphics, and Brandon Lee Design and I must say they are really cool.
I'm trying to figure out if I should start buying responsive themes or build separate themes for mobile devices like iPhones. I would need to re-do my sites if I go with responsive themes, but would have to build and do all the fancy pants stuff for an iPhone site detection if I went the other way.
Advice and Opinions?
(Also, if you have a responsive theme I don't know about, here's your chance to sell me one. I'm all ears and ready to do something quick!)