Microsoft Outlook SMS Add-in (MOSA)
Microsoft released a cool add-in for Microsoft Outlook 2003 and 2007: Microsoft Outlook SMS Add-in (MOSA). This add-in will enable you to send SMS text messages using Outlook, as long as you have a mobile phone or a GSM modem connected to your PC.
This download will enable you to send SMS text messages through most GSM mobile phones connected to your PC using Outlook 2007 and Outlook 2003. You can enter your SMS text within a Outlook-type entry form and have it sent to your mobile phone for delivery through your mobile phone network service. There is no requirement to install third-party software or to subscribe to additional mobile network services if your mobile phone can be connected to your PC. This is typically via an infrared connection, Bluetooth technology, or a USB/serial cable. The SMS messages can be saved as a draft, grouped, and forwarded like standard Microsoft Outlook e-mail.
The installation process is quite simple, it requires only a restart of Outlook. At the end you'll be presented with one additional toolbar, as seen in the next picture:
By clicking "New SMS Message", a new window will be opened in order for you insert the SMS text.