Making Site Mobile Compatible

In terms of making a website 'compatible' with mobile devices, my understanding is that the options are:

• more cost/time: develop a copy of the site, targeted to this specifically.

• less cost/time: the next best to use the handheld stylesheet, understanding that different mobile devices will read it different (or not at all in some cases)

Is that about right?

You would use a CSS style sheet aimed at "small screen rendering", but they are right
about developing a copy of the site. To do it right, you would develop a site just for
the mobile device ... that takes time of course.

And the biggest thing is testing the site.
You'll spend a lot of time testing on various phones, PDA ...
making it all work correctly. So expect it to be a lot of time.

And view the XHTML/CSS for the Flickr Mobile website....
http://m.flickr.com/#/home