In a pair of weeks I will start DMing my 4e SCAP.
PCs will be:
Elf Ranger
Elf Paladin (Pelor)
Half-Elf Warlord
(they will be brothers)
Human Wizard
Halfling Rogue
Tielfing Warlock
I still feel a bit unhappy about 4e up to now, in my opinion too much incomplete with so many classes missing, no summoning spells etc; but as we actually skip from 2e to 4e seems stupid to start with 3.5e.
Over the past months I stole from this forum a lot of improvements and made some of my own, and now I quite untroubled about the storyline and the setting. This time I will also DMing with few papers and a lot of digital resources.
I'm spending a lot of time converting things to 4e, and this is the worse part of the bargain, also because the results seems a bit a mix-up, but with the campaign ready I'm not feeling to steal time from DMing.
Best of luck with the game. As long as you have a solid story the edition shouldn't matter. Shackled City needs some work to be really solid but it's a great campaign.
If you want to share your conversions feel free. A few of us are tackling this job and I think the more sharing the better.
I'm working on converting Chapter Four at the moment (played up to Chapter Three in 3rd Edition). Once I have that chapter done I'll post my thoughts here somewhere (probably on its own thread).