Trending on peHUB this week: disgruntled LPs, Twitter, Dick Costolo, Marc Andreessen, TPG, Quintiles, Northern Tier, Apollo, Blackstone, NYSTRS, Grotech Ventures, LBO returns and CTI Foods

Insight Venture Partners — which counts Twitter, Flipboard, Tumblr, and Living Social among its many investments – has raised $1.49 billion and has plans to raise roughly $900 million more, according to SEC filings.

Take a break and catch up on the latest private equity and venture capital headlines this morning which touch on European businesses gearing up for debt; why venture firms are looking on the bright side and President Clinton’s maiden tweet.

Find out the latest private equity and venture capital updates with this morning’s First Read which unveils a Japanese Google Glass rival, where all the innovation is coming from and what Twitter desperately needs.

This morning find out about the Boston tech community raising money for the marathon bombing victims, why pension funds are hooked on PE and if you’re interested we have the link for the top ten private equity loopholes.

Rock star VC Bijan Sabet explains why he remains bullish on consumer Internet deals, what he learned from serving on Twitter’s board, and the secret to success for young VC firms such as Spark, First Round Capital and Union Square Ventures.

Social TV analytics business Bluefin Labs has joined Twitter. Last year, Bluefin Labs raised $12 million in a Series B round led by Time Warner Investments with participation from SoftBank Capital, Redpoint Ventures and Lerer Ventures.

Big data solution provider Crashlytics is merging with Twitter. The company is backed by Flybridge Capital Partners and Baseline Ventures and closed its most recent funding round in April.

Not everyone buys Twitter’s foot-dragging act. PrivCo, a New York-based research firm that focuses on private companies, believes Twitter will file to go public in the fourth quarter of this year, largely because of Facebook’s botched public offering last year.

Technology luminaries, venture capitalists and entrepreneurs stopped SOPA in 2012, and, judging by their statements at the New York Times DealBook event in New York, they’re setting their sights on United States immigration policy in 2013.