I tried CalWidget, and it was nice to see the agenda there on the home screen, but I tried a few more and stumbled across S2 Calender. It has a 2x1 widget (smaller is better for me), showing an entrire month in that spot. It lists the dates by color, depending on what appointment you have that day, and will underline/box/whatever you toggle for all day appoints, with the marker being in the color of that calender. When you touch the widget, it pulls up an active agenda widget allowing you to scroll ahead through your next 8 or 10 appointments, pop-up style, with each listing in the color of it's respective calender, with the date/time. I can't recommend it enough.
EDIT: having just figured out how to put in a QR, here's the one for this killer widget