Several improvements made and bugs fixed since beta 3:

New: Add (optional) third parameter to fnFilter() API function to indicate is regex strings should be escaped or not. Default true.
New: A couple of extra classes for the 'full_numbers' pagination buttons.
New: Plug-in method for custom API functions
New: API plug-in example
New: Package gzipped DataTables as standard (9.2k)
New: Portuguese Brazilian translation
New: Added variable length for the 'full_numbers' pagination type thorugh the variable jQuery.fn.dataTableExt.oPagination.iFullNumbersShowPages - with thanks to Jovan Popovic for his work on this!

Fixed: Updated German language file (thanks to Jorg Holz)
Fixed: Save state now works in IE (IE has an issue with the path of a cookie being anything but root)
Fixed: Save saving with full numbers rejigged slightly
Fixed: Tidied up a few spaces where there should have been tabs
Bug fix: Custom defined titles (sTitle) are applied to non-dynamically build tables
Bug fix: Fix offset issue when using fnRender() with bVisible parameter in the table table