Welcome back… 
So, why aren’t you using Lion’s Python? I also have Lion, and it looks like I can run Panda with its Python 2.7.1, so you should be able to use it with wx.
Here are some hints to uninstall Panda. Anyway, I’ve only installed Panda 1.8 on my Lion and ppython still says that its version is 2.5.6, so you’d better try using Lion’s 2.7.1.