What you need to know - 03/28/11

Google goes group messaging with Disco; Apple iOS 5 delayed to the fall for iPod's 10th birthday?

Aerohive Networks, provider of controller-less Wi-Fi and cloud-enabled networking, raised an additional Series D round of $25 million in financing.

International financial services company American Express took a note from Visa and unveiled Serve, a digital payment and commerce platform.

iOS 5, the next version of Apple's mobile operating system, is rumored to be delayed from a summer release, as has been custom, to the fall. Could the iPhone maker be planning a big promotion for the iPod's 10th birthday?

CertiVox, a new information security company, received £900,000 ($1,460,000) in Series A funding from Pentech Ventures, which led the round, and Octopus Investments, both based in the UK.

Google entered the group messaging battle with a new Web service and mobile app called Disco.

Group messaging app GroupMe added functionality for Featured Groups, allowing brands like MTV and Coachella to send content directly to users.

VatorNews' Faith Merino digs deeper into the death of print media.

Prolexic Technologies, an IT security provider of cloud-based cyber defense solutions, completed a $13.9 million financing led by Kennet Partners, a leading technology growth equity investor.

RIM acquired HTML5 developer tinyHippos and has integrated the team behind the startup into the BlackBerry developer team.

Upstream Commerce, provider of a cloud-based pricing and product analytics solution for online retailers, raised $1.25 million in funding from YL Ventures,