If you're interested in all the software and hardware you need to get started with the Propeller this is the kit for you. This kit includes ViewPort Ultimate and the Propeller Proto Board USB.
ViewPort is the premier debugging environment for the Propeller. The tool combines an integrated debugger with powerful graphics that show you what’s going on within the Propeller. Monitor variables over time with the built in oscilloscope or change their value while your Propeller is running. Solve hardware problems with the logic analyzer at sampling rates up to 80Msps. Add intelligence to your programs with the fuzzy logic module or integrate computer vision using the OpenCV library.
The Propeller Proto Board USB has all the features of the Propeller Proto Board and includes the USB programming interface on the board for those projects which need the USB interface in the application. For projects which do not need the USB interface after programming, we recommend purchasing the Propeller Proto Board (#32212) and Prop Plug (#32201) since the reusability of the Prop Plug reduces overall cost when programming multiple boards. Our Proto Board Accessory Kit (#130-32212) can be used to provide VGA mouse and keyboard connectors.
For more information about each product click below:

Downloads & Resources:
Download Free 30 Day Trial
Demo Videos (off-site)
ViewPort Applications (off-site)
Upgrade from Standard to Ultimate (off-site)
Online Help Manual (Off-site)
ViewPort Software article in ROBOT Magazine Oct 2009 (.pdf)