I created a Widget that displays the most recently added products from a Magento store. It should be a suite of widgets, but... the Magento API has issues.
I did not package it as it has problems... largely due to the unfinished / buggy nature of the Magento API.
However, you can see it, copy it, hack it, etc. Feel free to create a plugin based on the code. If you have questions about what parts of the Magento API work, ask them in the comments.