Heh, yeah, that's great. You should look up Locate City Bomb sometimes. It's the Locate City spell + a few feats which turn the spell into a level 5 spell that annihilates everyone within a radius of miles/level. There's a few threads on it on several forums; I'd suggest looking up the most recent instance of it on the WoTC forums, not Giant in the Playgrounds. They've got a few misconceptions about it which make it not work, in their opinion.
There's also other lovely tricks like using
Footsteps of the Divine (cleric spell) as a Ruby Knight Vindicator (that's a cleric/Tome of Battle hybrid). Basically, use
Persistent Spell (don't worry about the no discharging spells thing, spells with a discharge effect are a seperate category that doesn't include FoTD (notably things like resist energy, which absorbs x amount of damage before being discharged, etc) as it doesn't discharge under the rules, it just has two spell modes). So now you have 24 hours of footsteps of the divine.
There's a maneuver in Tome of Battle,
Tornado Throw. So, use the burst of speed. There are 14400 turns in a 24 hour period. So you now have a speed of roughly 144000 feet for the turn. Every 10 feet you can throw an opponent, with icnreasing modifiers to throw and damage. We end up throwing people well over the escape velocity of the earth.
Ring of fire is also fun. Run around a town, watch it burn.
But eh, perhaps that's enough D&D on a SR forum :p