Los Angeles - Twitter, a microblogging service, has raised $15 million in its second round of venture capital financing at a pre-money valuation of around $80 million, GigaOM reported.

An as yet undisclosed investor led the round, which included participation from existing investor Union Square Ventures.

News of a new financing round for the company first started to surface last month; Twitter has now raised a little over $20 million in funding to date.

The company's service lets users send out 140-character-long messages across a variety of platforms.

Related Links:
http://gigaom.com/2008/05/21/twitter-series-b-funding-done-raises-15-mm/

http://www.twitter.com