I've seen a few posts regarding c5touch, but most are quite old (around a year) and basically what I want to know is how much recurring work it is with c5 updates, etc. to keep it working.

Obviously, there may be a user-agent to add here or there, but the tutorial for it from Andrew (http://andrewembler.com/posts/optimizing-your-concrete5-website-for-the-iphone/) was for 5.3.3.1 and I'm just wondering how much of the core has changed / can change and still have it work.

I really don't know anything about c5touch other than what's on that page.

There are only a couple sites I've got it in mind for, where mobile may be a bigger deal than the others. Does anyone have any thoughts?