W00t! Glad to see you with a igep!!! I vote for Ubuntu because it ought to allow you to run Open Mobile on it.
Meego is not far enough along to be interesting beyond novelty.
Also, I hope you know more about Linux than I do. Getting Poky linux off of that thing and putting Ubuntu on it was incredibly, unbelievably difficult for me. Upgrading it from 9.04 to 10 was actually impossible for me. Info on that odyssey is here.