Tired of thumbing in text messages on your mobile phone, or struggling with the stylus on your personal digital assistant? Siemens AG and VKB say they have the solution: a virtual keyboard. A small device, developed in Israel by Delaware-based VKB, can project a nearly full-sized keyboard onto any flat surface and uses an infrared system to sense what the user is typing, Siemens said in a statement. "This is very useful for people who travel a lot and use a PDA or a mobile phone on the road. For typing in a long text while on a plane or train, for example," said Monika Winkler, spokeswoman for Siemens Procurement and Logistics Services, the Siemens unit that will distribute the virtual keyboard. The street price of a virtual keyboard should be about $A150. Siemens first demonstrated the virtual keyboard at the CeBIT tradeshow in Hanover, Germany, earlier this year. It will be the first distributor of the virtual keyboard in the world and is looking at building the technology into its mobile phones and handheld computers, Winkler said. Deliveries to retailers in Germany and the rest of Europe are planned for the second half of the year.www.siemens.com.