It is very easy to presume that when a new media agency refers to a client stuff  like a ''Sitemap'', ''Mockup'', ''Walkthrough'', ''Storyboard'', ''Draft'', ''Beta'', ''Pilot'', ''Demo'', ''GANTT'' etc etc that the client knows what you are talking about, there is a language designers and developers use that is simply not in their vocabulary.

This terminology also differs from agency to agency, for example I don't use the term ''Colourways'' or ''Swatch'' to describe what I would call a ''Palette'' or ''Corporate Colours''.

Often the terms used on new media projects are an essential part of a design or development process so if their is any mis-understanding as to what they mean this can have dire consequences.

In addition to to the non-technical terms you can add to the mix the Technical acronymns, the Software and File formats that are regularly added to such as ''CMS'',  ''LMS'', ''.NET'', ''W3C'', "PSD", "FLA", "SWF", "FLV", the list is endless. 

Basically, don't presume that a client understands the term or the process that you have labelled, explain it thoroughly and ensure that the client is on board, be willing to educate the client in a non-technical, non-patronising way (unless they are really really stupid in which case good luck to you!)

Richard