As Sony Ericsson has just bought Symbian UI(see
http://www.theregister.co.uk/2006/11/07/sony_ericsson_buys_uiq/), event
which coincides with the Ruby release for Symbian OS(see
http://developer.symbian.com/main/tools/opensrc/ruby/index.jsp). Ruby
for Symbian OS brings the power of the Ruby programming language to the
Symbian ecosystem, which is also being release to the Open Source
software developer community. Ruby language will be the booster of
productivity for mobile applications.

FURTHER INFO:
Symbian OS
http://en.wikipedia.org/wiki/Symbian_OS