I also got around for an hour or so of Resurrection of Evil; unfortunately I was left less than satisfied. The Grabber weapon is more useful than Half-Life 2's Gravity Gun, but also far less interesting or cool. The physics engine is adequate, but nothing like HL2's Havoc engine, which also detracts from the weapon's cool factor; the whole thing just basically feels like a ripoff of HL2 (which is something id Software should not feel compelled to do). I'll give it a fresh attempt tomorrow.

Finally, of note is the Classic Doom 3 project, which is sort of a must-have for any Doom fan.