I bought mine from Ikea. It has 2 shelves so monitors plus laptop(count has a monitor( all fit on one of the shelves).
MY old setup had 3 monitors + the powerbook was on an attach platform on the side.
I will try posting a pic so that you can get an idea.
Just so you know that shelf on the right has the exact same width as a 17" powerbook, so it would fit nicely!
I also measured and it would be possible to put 2x23 inch monitors, but it would be tight.
FYI: those are 17" lcds and 17" crt. The powerbook is my old 12inch which was replaced by a 15 inch. So now i have both black lcds and my 15 inch instead of the cdt, fits all well!!