Landscape vs Portrait
If you only shoot with your camera in the "landscape" mode, simply screw the camera to the monopod as already suggested. However, if you want to be able to orient the camera vertically, you will need some means to do this. You can use a ball head to do this of course. Manfrotto makes a device designed to do this on a monopod. It sells for about 30 USD. Here is a link to B&H for this device:
I just recently purchased one for myself but have not used it yet.
Have a good day.
Mattoon, IL USA
Canon SD1000, S3, 20D & 5D; Panasonic LX2. Canon lenses: 50mm f1.4, 16-35mm f2.8, 28-70mm f2.8 and 70-200mm f2.8 IS Also have two film cameras: Canon Elan 7E and a Yashica TL Super (which I purchased in Vietnam in 1969 for $106).