TwilightDirector David Slade has a total 'Eclipse' of the heart ...

With filming on the 'Twilight' sequel 'New Moon' already underway in Canada, Summit Entertainment is wasting no time in sinking its teeth into production on 'Eclipse,' the third film in author Stephanie Meyer's hit vampire saga.

After months of speculation as to who would land the coveted gig, the studio announced yesterday that horror director David Slade ('Hard Candy,' '30 Days of Night') will succeed Paul Weitz at the franchise's helm, continuing the trend of bringing in a new director for each film.

While Drew Barrymore, whose name was also bandied about as a potential directorial candidate, is probably a bit disappointed, 'Twilight' fans have plenty of cause for excitement. Here's a rundown of what's been revealed about 'Eclipse' thus far -- and why it bodes well for diehard aficionados of the obsession-inducing series.