What are my plans?
Well, let's see...
I like pie. So, I choose that option. Seriously though, I'm reluctant to switch my current campaign worlds to 4e. I've invested a lot of time and energy into them as 3rd Edition worlds. Thus, I'm not likely to switch to 4e anytime soon. (World of Kulan will remain a 3rd Edition world, period.)
I'm more likely to create a new campaign world specificly for 4th Edition. I've already given it a name and created a map for it, but that's it. It's too early to create anything more specific, IMO. I'll likely take a look at the books when they come out or, at least, keep informed as the new edition progresses.
Basically, what I'm saying is that I haven't decided yet, and I like pie.