Hi, i needed the same sort of thing, i must have spent about 2 days looking for a plugin to do this, it appears user specific plugins are a little short on the ground, in the end i decided to just create my own, take a look at http://www.normalpeoplehate.me.uk click on Users from page nav, then click on View next to a user (try my one) is this somthing similar to what you want? users upload images themselves after they log in, they can also delete pics and set a pic as the main one (which then shows up in the box), if it is what your after im sure i could help you implement it, its not a public plugin and i have no real plans to make it public, its a bit scrappy, but it works.
