How to wrap main content area around a block thats css is float right?

Hi,

I am wanting to wrap the main content area around a navigation links block that floats to the right.

I can get the nav block to float to the right but not the get the main content to wrap around it? It just looks like there is a column on the right with a blank space under the nav block.

Is there a way to wrap the main content?

thanks in advance?