I just tried the proudlynigerian.com jobrush thing about a week ago after a friend told me they got him a number of job interviews. In the last one week, they got me 2 interviews. I now only pray I do well at the interviews.
I think I like their forthright attitude, they didn't promise me a job but a simple way to apply once and get noticed by all the proudly nigerian organizations in their network. cool stuff. I'm sure i'll change jobs soon.