I was thinking of adding ringtones also. One thing I will not do is wallpapers, simply because they are pretty much a picture or image that can be loaded onto the blackberry already, and I personally think that is just a waste of space and time on everyone's behalf.
I do not have a URL up yet. I have about 120 themes sitting in a folder here on my computer at this time. If there are any certain ones that you are looking for, email me and I will send you everything I have until I can get a site up and running. I would like to get a MINIMUM of 500 themes before I upload them all into a site so that is not just in limited numbers.
Hopefully some of them will start flowing into my mail box and I can have that accomplished by the end of the weekend.
However like I said, if there are specific themes you are looking for, let me know and I will send you the sample screen shots and zip files of what I have found so far.