The new flight planner is available as of 4/25/12 on the FLYING page. I’m sure there are still plenty of bugs.

There is also a Metar Decoder and a Query Tool that retrieves airports, fixes and navaids from the FAA database.

There are plenty of tools for doing similar things. The Flight Planner is a little unique in that it is airplane sensitive, which makes it much more useful to me than other such tools, but equally makes it less useful for anyone else.