Inventor Town has come up with an online-based MSP430 firmware editor, which enables developers to edit C-code within your web browser, without the need of an IDE such as IAR or CCS. The files are simply compiled in the cloud within Inventor Town's servers! MAGIC! This online compiler is based on the open source MSPGCC and is available today as a BETA.
Check out the web-based code editor @ Inventor Town's website
More lively discussions are available in the online forum at 43oh.com
See the online tool in action with the MSP430 LaunchPad: