I use stumbleupon to drive traffic to my sites. I have several blogs, one for recruiters and one for job seekers. When I write a new post I hope that someone will stumble it and provide a good review. I hope other stumblers will also give it the thumbs up and help me to get traffic there. Whether it is a post regarding career advice or a new job posting or advice for recruiters, Stumbleupon helps get the needed traffic to your posts, in turn helping you fill jobs and recruit talent effectively. As recruitment professionals we can help each other by stumbling each others material. When pages are stumbled with the proper tags and categories job seekers can search with targeted keywords and find us.
Have you seen any traffic to your web sites that came from StumbleUpon jet? The reason I am asking is that I have only seen it a couple of times (on about 20 recruitment related web sites I run). StumbleUpon traffic is fairly characteristic, since it generates spikes in traffic. Have you seen the impact of the StumbleUpon on your web site traffic jet?
PS. I think that Digg works much better for the recruitment web sites!