Essential Power Tools for Office 365
Can Office 365 host custom code? It can in Sandbox mode. I wasn't excited about the Sandbox when I first started working with it: you don't have access to server-side resources and most of the code I've been asked to write over that last few years has a lot to do with security, which is a no-go zone for the limited object model exposed to Sandbox solutions.
However, you can do some pretty interesting stuff. Here are some of commonly requested features packaged in a Sandbox solution. You can deploy this code to Office 365 and it will work. You don't need to be a server side admin.
If you would like to install these components on your own, click here and I will send you a copy.
Thanks for listening,
Jeff