Interestingly, I created an organization called the Grey Wardens for my short-lived Ghelspad campaign back in 3.0. They were also politically neutral, though mostly like Old-West Marshals (bringing law to lawless areas) rather than monster hunters. Of course, it being DnD, some of the lawbreakers will inevitably be horrible monsters...
I run all my combats in a OpenOffice document. Just type in all the character and monster names on separate lines, have them roll init, then arrange them accordingly. Next to the monsters, I put the same labels as the individual monsters magnets on our white board (Y = big yellow, y = little yellow, B = big blue, etc), so an encounter in-progress might look like this:
Enselmo: 23, 5(s), slow(15)
Skeleton Archer: 20, y35/10, dz(23), Bone Shot() b35/30, +2 hit v Enselmo, Bone Shot() g35/0, Bone Shot(X)
Skeleton Clubber: 15 R50/20, Smash(X) B50/0, Smash(), pr
Vincent: 10
Descriptively, the above is a fight: two PCs, Enselmo and Vincent vs. 3 skeleton archers and two skeleton clubbers.
Enselmo has 5 ongoing damage (save ends), and is slowed until the end of the Clubber's turn.

ellow skeleton archer has taken 10 damage, is dazed until the end of Enselmo's next turn, and has his Bone Shot power available, (b)lue skeleton archer has taken 30 damage, has +2 to hit vs Enselmo, and has is Bone Shot power, (g)reen skeleton archer has used Bone Shot.
(R)ed skeleton clubber has 20 damage and has used his Smash power while (B)lue skeleton clubber has is Smash Power but is prone.
Vincent has no status effects.
This way I can quickly keep track of status effects, monster hp, effects on players, etc. If people/monsters change initiative, I just cut/paste their line to its new place.
DDI also saves a ton of time for me too. I had similar time reductions 2-3hr prep time to 1/2 hour or less. Since I've gotten Adventure Tools, I've had several sessions with 0 prep time since it's so easy to throw things together on the fly!
Oh, and I'm also really enjoying reading this, lots of great ideas and an entertaining read as well.