webcrawl to cache dynamic pages

[Richard Lyons <richard@the-place.net>]

I am considering how to crawl a site which is dynamically generated,
and create a static version of all generated pages (or selected
generated pages).  I guess it would be simplest to start with an
existing crawler, and bolt on some code. Or, alternatively, write a
script (perl, I fear) to modify the cache built by a crawler. 

The idea is to allow a static ecommerce site to be generated from any
database-generated shopping cart system.

Any advice where to begin?

TIA

-- 
richard