Despite some success on certain Windows Mobile devices, Skype are no longer continuing development or support for their software on this platform. This is of course disappointing, and it remains to be seen if this attitude will be revised following the release of Windows Phone 7.
However existing users of Skype on Windows Mobile can still use the app - which means anyone that can find a copy still has the chance to use the service.
One location online where Skype can still be downloaded is CNET. Unlike third party Skype clients for Windows Mobile, this version allows for text chatting as well as voice conversations, and features improved sound and stability. The download file is an executable (.EXE) file that requires the phone to be paired to your PC and Activesync to be running in order for the installation to succeed - get this from download.cnet.com.
The first run of Skype for Windows Mobile requires that you sign in to your Skype account – after that, it’s a case of making and receiving phonecalls over the Skype network and beyond, or regular text chat.