bootable system or not...
I don't think handing a customer an entire live OS on optical media is a good idea. It takes too long to get to a desktop, and there may be problems with default settings preventing a desktop at all without user intervention.
A disk that pops up a web interface preloaded with your 'business card' on the other hand is a good idea. You can provide all manner of links the client may find useful, eg a link to download MBAM, a link to a Microsoft alert, links to cost/benefit analysis information... limitless possibilities that a paper business card just can't provide.
But a live OS? Recipe for a plethora of potential disasters, one of them certainly being doubt about your opinions and capabilities.
