Today in tech: Apple bans Flash, Twitter developers warned

Apple bans Flash from iPhone and iPad

The licensing agreement for the newly unveiled iPhone OS 4.0 ensures Adobe's Flash isn't going to turn up on the iPad or iPhone anytime soon. PC Pro

Twitter developers warned they could fall by the wayside

A major investor in Twitter has warned that third-party clients developed for Twitter could be a waste of time if the growing social networking site decides to build its own versions, urging developers to focus on games and other external apps. Telegraph

HP looks to change memory with memristor chips

Researchers at HP think memristors - first proposed 40 years ago - could replace transistors in chips and make for quicker, more efficient computing. BBC

Child spends 900 on Farmville

A mother has warned of the financial risks of online games after her 12-year-old son spent 900 on in-game credits for popular Facebook game Farmville. Guardian