Are there any recommended social tools to help keep better track of candidates?

A spreadsheet?

You may want to consider Unrabble (http://www.unrabble.com). Unrabble allows hiring managers to post job positions automatically to social media sites. Plus, when applicants apply for positions and they connect their social media accounts to their profiles, hiring managers can see a more holistic representation of their qualifications, including their social media profiles.

Garick,

Bullhorn Reach (http://www.bullhornreach.com) is the only tool in the social space that helps you identify passive candidates among your social media connections before they've told a soul. Using our patent-pending algorithm, 'Radar,' we call out those among your social media connections whose behaviors indicate that they may be looking for a job (e.g., on LinkedIn, if you updated your profile, connected with a third-party recruiter and/or received a number of recent recommendations, you're looking for a job!). The ultimate aim is to cut down on the time and energy that you have to spend monitoring your (likely massive) networks for opportune moments to nurture passive candidates in your network.

Separately, Bullhorn Reach makes it easy not only to post your open job listings to LinkedIn, Facebook and Twitter with a single click, but also sends you email updates (along with the social source) as soon as a candidate responds to your listing (which helps you track the applicants). It also provides metrics on which channels are driving the largest proportionate amount of traffic (so that you can make better decisions about which social channels you want to lean more heavily upon in your social recruiting strategy).

The best part is that it's free to try! For our enterprise clients, we offer the opportunity to integrate with your ATS (integrates 'out-of-the-box with the Bullhorn ATS), and have open APIs, in case you want to handle your ATS integration yourself or via a third-party.

And, last but not least, since launching in February 2011, we're garnered roughly 40,000 users (mostly recruiters and hiring managers), and continue to gain more users at a meteoric rate.

Hope that helps!

I recently wrote a post entitled "Recruiting in the Digital Era: Updated Guidance for Employers, Recruiters, and Candidates" that folks interested in this question may want to check out. Here's a brief description and a link:

Targeted primarily to “social recruiting” rookies (both individuals and employers), this post provides an overview of how employers can and should incorporate social media and other digital technologies into their talent acquisition processes.

http://tiny.cc/DERecruiting