there is a plugin for that, called "profile URL"

Nice, thank you!

@  Emurph, If you are going to use profile URL plugin, be careful when using str_replace(); it can take a very very long time if you use it with long replacement character or words. if you want to know what I am talking about read this http://community.elgg.org/plugins/1091233/1.1/profile-url?annoff=50

Thanks for the heads up Tom. Question, would that also do rewrites for the pages and groups as well?

Wouldn't it be easier(maybe) just to use .htaccess and mod rewrites?

Thanks for your help.