Online campaign is go

Okay, so we did our test run with maptools last night. It went swimmingly. Although I'm not completely satisfied with some things, I realize I was expecting more than I realistically could expect from it. After all, the main reason I'd be using the program was to simulate a battlemap, and it did that perfectly. The things I wanted extra were just that; extras.
It took us about one hour for everyone to be up and running both Maptools and Teamspeak (so we could talk instead of typing everything in the chat window). Character generation took us another hour or so, made slightly aggravating by the fact one of our players didn't have the PHB with him. A character sheet was found online and copied.

As for the game itself, I kept it very simple. A bunch of goblinoids had invaded a local wizard's tower and the heroes were just the people to clear them out. So, they kicked down the door and started a melee against every single foe inside at the same time. They found out pretty quickly that that wasn't a good idea, and started using their brains. While the dwarf warrior (Brf Grrr, don't ask me to pronounce it) held the door, the two rogues (Marielle le Rouge and Varis Darkstrider) were shooting inside, targetting the stronger foes first.
The bugbear leader of the bandits, annoyed at being shot at continuously, charged outside, dragging a few of his minions with him. While Brf was holding the portal as much as he could, Marielle and Varis were in a fight to the death. They eventually prevailed, thanks to well-placed uses of flanking and sneak attack, and hurried back to Brf, who was slowly being overwhelmed by the sheer number of foes. Eventually, though, the managed to break the morale of the remaining goblins, who scattered, never to return.
Once they searched inside, they found a note, detailing that the goblins had been hunting for a band of kobolds, who had stolen the Eye of Gruumsh...
We ended the session there, as I hadn't prepared more than the one encounter.

Everyone agreed however, that the system worked mighty fine and that a campaign over the internet is a real option. The question now is; what do I run? I have an idea for a sandbox campiagn, but it's far frombeing ready to run. With schoolwork and SWAMP, I don't think I'll be able to get it ready in the week or two we have before the campaign takes off.
Another thing is that some of my players want to keep playing the same character as in the testrun, but that includes an elf, while my first idea for the sandbox is to start of human-only. Decisions, decisions.