3EPC released its 3G Monitor tool; eee220. This is an Eee PC based monitor tool for the Huawei e220 3G USB-Modem.
When you insert your e220 into an USB port, the tray monitor will popup & shows you the current signal strength & will give you the option to connect/disconnect or to configure which connection it should monitor.
The goal of this 3EPC project is to be feature-equivalent to the Windows based application that most service providers bundle with the e220. So you have the ability to enable/disable roaming onto 2g networks & also sending/receiving of sms messages & management of the SIM based address book.
Features implemented so far include a signal strength meter, statistics for upload/download speed, upload/download data & connection duration.
Although this tool is designed for the e220 it may work for other 3G USB-modems as well. Its known to work with the Huawei e170 also.