Some experts think the time is right to test consumers’ appetite for same-day service. Others warn of a hidden danger lurking behind these ventures that could test the fabric of society itself.

This week, entrepreneurs are discussing Proposition 30, a temporary personal income tax hike in California that will impact the most successful of them. But dislike it though they may, it’s not enough to drive them out of California — not by a long shot.

Practice Fusion, which operates an electronic medical record platform for 150,000 medical providers, has raised a $34 million Series C round of funding led by Artis Ventures. Other investors in the round include Felicis Ventures, Band of Angels, Founders Fund, Morgenthaler Ventures and SV Angel. among other institutional and individual investors. The company says it has now raised $64 million in total funding since it was launched in 2007.

BlueRun Ventures, Ignition Partners, Founders Fund and angel investor Scott Banister (co-founder of Zivity) joined a $15 million Series C round for Topsy, the San Francisco-based company announced today. Western Technology Investments joined the round, which brings to $30 million the amount of equity and debt that Topsy, a provider of real-time search engine services, [...]

When I was first introduced to San Francisco-based social networking startup Tagged.com, it was 2005 and the nascent company was limiting its service to pre-teen and teenage users. The implicit message was that Tagged would protect its young base from the sexual predators trolling around MySpace (which, at the time was generating a slew of negative [...]