VentureBeat

Here’s the latest action:

Mashup companies take over Web 2.0 — InfoWorld profiles three companies making announcements at this week’s conference: Serena, which is launching an online marketplace for business mashups; JackBe, which has a new version of its enterprise mashup platform; and Kapow, which provides a hosted service to build mashups that provide web intelligence. We’ll also be writing more about Rearden Commerce and Zude in the next few days. And we just covered SnapLogic, which provides data integration for, you guessed it, enterprise mashups, and has launched version 2.0 and professional editions of its software.

Linden Lab names Mark Kingdon as new chief executive — Kingdon previously spent five years running digital ad agency Organic. The appointment of someone with a stronger business background than founder Philip Rosedale makes sense, particularly since Linden Lab board member Bill Gurley told me the company needs a chief executive who can help it grapple with rapid growth. Less charitably, the appointment can be seen as an attempt to help Linden get back on track after struggling to live up to the initial promise of its virtual world Second Life. Rosedale announced last month that he plans to step down.

IBM buys storage company Diligent Technologies for $200M — The terms of the deal were not disclosed officially, but Israeli newspaper Globes says it was for $200 million. Diligent is IBM’s third Israeli acquisition this year.

StumbleUpon approaches 5 billion stumbles – The website-discovery and rating service is about to get its 5 millionth user, and is also getting very close to nearly 5 billion “stumbles” (recommendations). Not only is that a number just plain impressive, but since each stumble should improve StumbleUpon’s “discovery” service, it also means the site is getting better and better. StumbleUpon is owned by eBay.

Solar plant builder Stirling Energy Systems gets $100M — The funding comes from NTR plc. Stirling is building solar energy projects in the Imperial Valley and the Mojave Desert.

Walter Bender resigns One Laptop Per Child — Apparently Bender , who served as the organization’s president, is more interested in incorporating open source methods into education.