I'd like to upgrade my website to be easier to manage. Must be open source, generate standard HTML, be positively and absolutely Flash-free, templates must be fully customizable, and the whole package easy-to-use. I'm not looking to make any changes to the look or the content itself, although don't mind minor visual changes if templates demand it. I don't mind paying if the result is good. Joomla! with extensions seems to fit the bill.
The main PITA with my current site is in adding geotagged content, and I'm hoping Joomla! would be able to pull geotags from JPEG metadata. E-commerce might come in play for some other sites I'm working on.
Any experiences from LL users on Joomla!, especially how easy/fast it is to migrate an existing website to it, how easy it is to add content, using geotagged images, and of course sample sites?