We've added a simple Calendar Extra which allows you to show links to events, one month at a time. The events are displayed in an AJAX popup window when you mouse over a date that has events. An event has a date, time (plain text), sort order (for more than one event on the same day), title, description and URL to turn the title into a link. It's all style-customizable, as usual.
If you'd like to see a live example, take a look at madisonsymphony.org. If you're interested in firing up a calendar on your site, drop IMS a line and we'll get you started.
Note: this extra has a corresponding RSS feed. You can display a linked RSS image in the events window by putting the image as a background.