We have an ASP-driven product site, 40-60 pages, page design is based on 3-4 simple templates, minimal JS scripting, mainly for navigation, plus standard integration of e-Junkie shopping basket which refers to their site and should work without changes on any page.
We have a proof-of-concept project of "converting" CSS, page templates and simple scripts from the current site to Joomla. It comes down to reproducing our site design with its small number of templates in the Joomla environment. Then we can rebuild the content within new templates by copying HTML and graphics.
If there is an automatic tool to assist us in auto-converting existing content into new templates, it would be a nice-to-have but not mandatory (for example, our online HTML manual is quite long and it would be great to auto-convert it to the new Joomla template).