A co-worker keyed me in on a company called IronPort that provides a detailed Reputation lookup on many IP Addresses as well as a catagorization of the IP Address by Industry.

IronPort Web Reputation Tracking—an Innovative Approach

IronPort Web Reputation tracking helps protect against a broad range of URL-based threats. This solution asks a simple but powerful question—"What is the reputation of the URL?" When assessing the trustworthiness of a URL, a great deal can be determined by analyzing data that is hard to forge, such as how long the domain been registered, what country is the Web site hosted in, is the domain owned by a Fortune 500 company, is the Web server using a dynamic IP address and more.

IronPort Web Reputation tracking is enabled by IronPort’s common security database—the SenderBase Network, the world’s largest email and web traffic monitoring network. SenderBase tracks over 50 distinct parameters that are excellent indicators of a URL’s reputation.

IronPort Web Reputation tracking differs from a traditional URL blacklist or whitelist in that it analyzes a broad set of data and produces a highly granular score of -10 to +10, instead of the binary "good" or "bad" categorizations of most malware detection applications. This granular score offers administrators increased flexibility; different security policies can be implemented based on different Web Reputation scoring ranges.

So one company has introduced metrics in scoring IP Addresses (score between -10 to +10).

The initial application was intented for Security purposes (ie: Phishing, SPAM and email virus attacks) but the data can also be used for Personalization (showing your visitors something different depending on what Industry they belong to).