Jonathan Schwartz ended six months of silence on his Twitter feed on Thursday with the words "Started a new company."

Arm Holdings has taken the wraps off its next major chip design, promising a five-fold increase in performance that the company hopes will take it beyond smartphones and into new types of equipment such as high-performance routers and servers.

Apple announced last week that more than one million users signed up for Ping in the service's first 48 hours of availability. Ping, as apparently a million of you already know, is the music-focused social network built into iTunes 10, which the company released just last week.

If you own an iPhone 4 and find that you burn too quickly through its battery despite the 16 percent capacity bump, you have a new battery expansion option from an old favorite. Mophie has announced the Juice Pack Air for iPhone 4.