I just noticed the same thing this morning... I was all hyped up to get a couple extra inches of leg room because all I need is like another 2 inches in order to be totally comfortable... But they did change the seat rails.

However, while drilling out the tab inside the centre of the rail, there still are tabs - it looks like instead of being on the top, they've moved them to the side inside the rail. Whether this affects the seat or not, I have no idea.

So, since there were no further answers to this thread, I guess no one has done the seat mod for this type of rail.

(Mine's an '04)