Nick Finck on XHTML Wireframes
Nick does a killer job in a post on XHML wireframing and use and reuse of deliverables. This is something I had been doing for years and found it really made the conception to inception process really quick. It also gives the means to keep your documentation up to date. The time savings with XHTML wireframes has been about a quarter to a third of the development time saved.
Those who don't like giving clients clickable wireframes, the pages can be printed/saved out in PDF and annotated.
The other knock is IAs not knowing XHTML or CSS. Somebody working in the practice of web development and web design that does not have an understanding of the handful of elements in XHTML needs to learn it quickly. Go look at CSS Zen Garden to get an idea of what design can be done on top of properly structured XHTML. Lift the hood and look at the mark-up. It is not that difficult.
In short go read Nick's wonderful piece and give XHTML wireframes a shot.