[SauronOfMordor]

There's also the material of The Silmarillion, detailing events of the early days, including the first War of the Ring which was covered briefly at the beginning of the Fellowship movie

[lesser_satan]

I guess there's a Children of Hurin film in the works.

[grellis]

JMO, but the best way to film The Simarillion would be as a made for cable miniseries, anywhere from six to twenty installments.

I don't usually go for the made for cable stuff, but there was a miniseries last year, The Lost Room, that was very well crafted. It can be done right...but it's usually not.