One of the annoying things nowadays is how a search on Google for the item one is looking for, in this case 'responsive css mobile' returns many very general links. There's so much noise.
a) on how you really should do it, it's the future.. but no discussion, apart from spam "yes I agree" comments
b) things like "use a responsive wordpress theme" or "use webtool xyz and its built in responsive layouts"
c) blog posts that are so basic you wonder why the person put them up
I reckon for mobiles I'm going to have to do a whole lot of style swaps to move columns around, change widths , make icons bigger (recommended size is an enormous 40 px square for average finger tips), swap large images for smaller ones to avoid un-needed data download, do an alternative menu structure, handle pixel density for high res screens.
There's quite a nice mobile preview tool as an Opera download, but really you need a touch screen at the least - I better get a tablet.
All reminds me of the issues of getting things to work in IE 6/7/8..., Safari, FF etc.. which we all thought were just about gone for good..
Heyho, I'd much rather be coding PHP ...