Gnip, a company that provides technology to help other web services quickly share information provided by users, has raised $3.5 million.

Here’s how Gnip works: When a user updates their information on a site like Digg or Twitter, it takes that information and updates it quickly on the user’s accounts at other sites, such as Plaxo’s personal information aggregator service, Pulse.

The San Francisco, Calif. and Boulder, Colo.-based company has already signed partners like Yahoo and Plaxo.

The investors in this round include previous investors Foundry Group, First Round Capital and SoftTech VC; they previously put in $1.1 million.

In developer-related news, Gnip recently decided to stop supporting the XMPP protocol, which allows for “real-time” or near-instant information sharing between two sites. It’s one of several protocols that Gnip has supported. From ReadWriteWeb:

[Gnip chief executive Eric Marcoullier] says there are simply no open source Jabber servers that are capable of the kind of robustness that a social media ping server requires. If a major vendor came to Gnip and said they wanted data streamed to them exclusively in XMPP, the company would continue the practice, but the long tail of tiny consumers that want their data that way is taking up too much resources. The company’s top priorities are data delivery and maximizing the number of publishers participating in their program.