I’ve recently been evaluting the use of various Twitter applications. Yes you can update your twitter in the UK via an SMS from your mobile but to review your timeline you need an application.
Twikini is a lightweight very functional programme for Windows Mobile devices. Coming in at just 110k it still provides everything you need to tweet and keep yourself up-to-date.
One of the more unique features of the programme is to update your location via the GPS functionality of many phones by uploading the longitude & latitude to Twitter