I wrote a jqGrid/BBQ integration. It makes the grid work with browser history.

For example, if you click to go to page 2, then your browser's back button will take you back to page 1. Forward then goes to page 2.

Also, rowNum, sort, postdata, and other grid features are supported. It's configurable and extensible.

The only documentation, for now, is the source code. I'll fix that when I have time.