I am currently GM'ing an unconventional (more colaborative story-telling with a boat-load of puppetable NPCs) PbP based on my TF Inchon scenario.
It is centered around a Marine rifle company (G-Coy, 2-2 Marines). They call themselves "Ghost" company instead of Golf since it sounds a lot cooler. There is, of course, a double meaning there as well. Here is what we've done so far.
http://rpol.net/game.cgi?gi=47303&date=1339696734
ATM, the company is fighting off a "regiment" of the Soviet 3rd MRD. They're very close to being cut off from the rest of the TF. The rest of 9th GTA is pushing west to cross the canal bridge on its way to the main body of 2nd MarDiv near Gdansk.
The canal bridges were the main objective of the TF. Once those were captured/repaired, the mission became holding them. The highway interchange became important later, once the decision to hold the city was made. When the lead elements of the 9th GTA showed up, the interchange became a natural chokepoint/buffer zone to defend. The LAVs and battalion AT assets defended it valiantly but could not cope with the Soviets' marked firepower advantages.
In my macro scenario, Elblag was "captured" without much of a fight (the local militia had been bought off by the DIA prior to the landings) and held, without much incident for several days. The 8th MID passed through on its way east and, a couple of days after it's trailing elements had departed, the Soviets started to show up in strength. It was all down hill from there. In keeping with the backstory for the Kalisz scenario, no one at Corps/Divison intel anticipated a Soviet offensive/counteroffensive in the AO.