Just for fun, this Friday’s mobile content bits will feature only companies with “cell” in their name....

-- Cellpoint builds mobile bookstore for SAXO.com: Saxo.com, an online bookstore in Denmark, said that it’s using Cellpoint Moble’s mPoint technology to build a mobile site. Customers can access the store by texting “saxo” to a Danish short code. The customer will then receive a message that takes them to the mobile store, where they can browse and purchase books.

-- CellSpin creates multimedia features for Twitter: San Jose-based Cellspin said that it is supporting audio, video, picture and text messages that can be uploaded to micro-blogging sites Twitter and Pownce. Users who download Cellspin’s mobile application, can leave audio Tweets, or send a picture or video, which allows a message to get across very fast and easily. The application is free, and works on more than 300 phones with the Symbian, Windows Mobile 5.0 and 6.0 or Blackberry operating systems. Others are expected to come soon.
Multimedia tweets can also be sent from CellSpin’s Web site. Release.

-- Cellufun and PlayPhone partner for game portal: San Jose-based PlayPhone said its working with Cellufun to gain access to Cellufun’s more than 5.5 million monthly unique visitors and a catalog of free mobile games. The two companies said it is a good way to cross-promote their content, and will continue to look for similar partnerships in the future. PlayPhone will make Cellufun’s free ad-supported games available through at http://www.playphone.com and a custom WAP site powered by Cellufun. Release.