I am a real fan of Open Source software, and there are some great projects around, however up till now the e-commerce category has missed out. Nearly all of the open-source e-commerce systems I have checked out are just big piles of spaghetti code, that not only make development and maintenance of online shops a headache, I consider them to be grave security risks.
Magento has actually been designed - that has got to count for something! While with other projects I wince when I look under the hood, with Magento I am being pleasantly surprised by each new aspect I look at. In fact, I think there is a lot I can learn from this well implemented system. It is now only a preview release, and it is already light-years ahead.
Web Developer and Consultant