The shortage of technology workers in the Silicon Hills region continues. The Austin American-Statesman today reported that the recent trip technology CEOs from Austin took to California didn’t result in any new employees moving to Texas. Perhaps that’s why San Antonio-based Rackspace recently opened an office in San Francisco. The technology companies have to go where the talent resides. Also on Saturday, Rackspace held a recruiting event called Rackerpalooza at its Austin office. Rackspace also recently expanded its San Antonio headquarters.

On Friday, Dirk Elmendorf, one of the founders of Rackspace, gave a talk at San Antonio’s Startup Ignite’s third monthly Hack-a-thon at the Geekdom in downtown San Antonio.

On Wednesday, Austin-based Portalarium, which makes games for social networks and mobile platforms, announced its first social network game, Ultimate Collector: Garage Sale. Gaming Legend Richard Garriott is developing the game, which will be available for a beta release later this year.

Also on Tuesday, the Austin American-Statesman reported that a group of investors including San Antonio Billionaire Red McCombs has invested $1.75 million in an Austin-startup called Bypass Lane, which has created an app that lets people order food and drinks from their seats in a stadium while watching an event.

On Tuesday, the University of Texas honored 40 inventors including Professor John Goodenough and Professor Adam Heller, pioneers of lithium batteries, according to this post from University President Bill Powers.

On Monday, Gowalla’s founder Josh Williams officially announced that Facebook had acquired the Austin-based start-up, but it didn’t acquire the company’s data. It mainly wanted their development team. The Austin American Statesman had a story on the acquisition and didn’t mention anything about the $10 million Gowalla raised in venture capital. But Michael Arrington at Uncrunched reported that the deal might be a liquidation and it was uncertain if investors would get their money back.

On Monday, Globalscape of San Antonio bought Tappin of Seattle in “a deal worth up to $17 million,” according to this story in TechFlash.