[0xDECAFBAD]: And the idea of storing a history of one’s web browsing in a local cache, available for review and later search, has always seemed incredibly attractive.

I love this idea - Though I would gear it more for mobile devices like the Pocket PC (especially the Siemens SX56 Phone Edition device i’ve been playing with). Some additional thoughts: You could have compressed caches for better offline content storage, as well as combine it with a download queue system — surf around on pocket pc, marking things for later retrieval. When you sync with your desktop (and you have broadband), download them.