You can now upload, store and manage multiple userpics. To select the one you want as your default userpic, just click on it. When it turns red around the border you are set to go. You can use this same gallery to delete userpics and to add new ones. To delete a userpic, simply click on the radio button next to the userpic you want to delete and hit the delete button.
Uploading works the same as before. I am probably going to tie in the little image manipulation program from p:labs in the near future.
You can find this userpic gallery by clicking on your userpic on your profile. You can reach your profile, by clickling on your userpic on your journal.