My manager asked me to research one of these: http://www.leadsexplorer.com

I don't know a lot about them. It did concern me though that it could be a privacy issue. It says you can email or phone call people after it's collected the company name and info. However, after having done some email marketing, the only recommended way to contact someone is if they are an existing customer or have given you permission to contact them.

Has anyone had any experience with this service or others like it? Or, what are some opinions on using services like this?

Thanks.