The new eagerly awaited open source Magento eCommerce was launched yesterday, and it looks every bit as good as was promised! We've been playing with it all day and are all very impressed.
It can be downloaded (for free) at
http://www.magentocommerce.com/ - where they also have a demo version installed so that you can view the front and back end of a working copy. It's well worth a look - it's powerful, very customisable, and it's quite easy to quickly build an attractive web standards compliant eCommerce site.
We've just launched our new PHP 5.2 server to coincide with this launch as it won't run on anything else, so if anyone would like to give it a try, create a hosting account here
http://www.nublue.co.uk/web_hosting/magento and we'll install a copy for you for free.