The mobile wallpapers website is coming along nice. I know I promised user uploaded content, and that is coming soon, but I just need to focus on performance and tweaks of the site before I tackle user content. Coppermine, while a very fantastic gallery, is pretty limited in certain areas that I will have to design plugins for and/or modify to fit what I am trying to accomplish.
Things to do:
-either auto-resize content according to category, or present the user with a message about resolution sizes if a user submits incompatible resolutions.
-either manually approve and move user content to proper category, or allow users to submit directly to a category>album.
-a better mass uploader.
-and much more that I can’t think about because the smell of BBQ is distracting my train of though. 
I’m really enjoying the theme/design of your web site. Do you ever run into any browser compatibility problems? A few of my blog visitors have complained about my site not working correctly in Explorer but looks great in Firefox. Do you have any suggestions to help fix this issue?