So, with 15,000 user names gotten, I decided to go ahead and revise my userpic script. It now grabs a user name from the file instead of having to load up a random page and extract the user from there. Also, it now picks a random userpic from the user's page instead of just grabbing the first one on the page.
I will continue to add more user names to my list, so the program should only be getting better. Whee.