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What: Shares of LivePerson (Nasdaq: LPSN) are living it up today, enjoying gains as high as 22%, after the company reported fourth-quarter earnings last night.

So what: Fourth-quarter revenue jumped 22% to $36.5 million, with full-year revenue similarly putting up a 21% increase to $133.1 million. Looking at the bottom line, net income in the fourth quarter came out to $3.9 million, or $0.07 per share.

Now what: Guidance looked solid also, with first-quarter sales expected to be between $37 million and $37.5 million, which should turn into earnings per share of $0.08-$0.10. LivePerson added 25 new names to its customer list, providing real-time chat, voice, and content services. CEO Robert LoCascio said, “2011 was a noteworthy year for LivePerson as we began to shift from the framework of a single product to a multi-product platform offering our customers even more ways to meaningfully engage their customers.”

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