— O2 relaunches portal: UK operator O2 has relaunched a reworked version of its Active mobile internet portal for its latest handsets so that the site more closely replicates a PC experience, reports NMA.co.uk. The portal also makes it easier for subscribers to reach mobile internet sites. The new portal launches across 15 handsets ranging from Nokia (NYSE: NOK) and Sony (NYSE: SNE) Ericsson (NSDQ: ERIC), but not including the iPhone for now.

—Birmingham Post goes mobile: UK newspaper publisher Trinity Mirror (LSE: TNI) has launched a mobile version of the Birmingham Post. The mobile version contains content designed specifically for mobile screens, alongside the ability to customise the site’s homepage. Users can select different content, send stories to friends, or post comments on specific stories, reports Journalism.co.uk.

—Cellfire partners with GameStop: Mobile couponing service Cellfire said GameStop will use its service to distribute mobile coupons redeemable at more than 4,200 of its video-game stores. Customers will just have to show the coupon on their phone’s display to get the discount. To receive the coupons, users will have to subscribe to the service on their Web site, or text a certain codes to 22888 to get the specific offers. To get an 30 percent credit when trading in or exchanging games, use “GSA,” and to receive 20 percent off any used game Text “GSD.”

—Sony Ericsson launches SDK for Xperia: Sony Ericsson said the SDK, which will enable developers to build apps tailored to the XPERIA phone, is now available with even more tools. Initially available in Sept., developers have already been able to start using the SDK, but now in version 1.0.4, there’s added support for Windows Vista, and now there’s a true phone device emulator, allowing developers to text apps without having to have a phone. Developers will also be able to enter their work in the 2008 Sony Ericsson Content Awards in a special category dedicated to XPERIA, which can be found here.