For a while now, web developers have been mixing and matching web services such as Google Earth and Yahoo Weather to create mash-ups that perform useful new functions. Likewise, programmers have grown adept at tweaking the code used by open-source software programs. The result in both instances has been unique applications the developers of the original technology likely never dreamed of. US start-up Bug Labs (http://www.buglabs.net/products) wants to harness some of that same creativity by enabling tech-savvy do-it-yourselfers to create their own mobile devices.