If you really want to be positively mobile without carrying a laptop between clients, or between locations, you can subscribe to a desk-top service that gives you all your personal settings all in a browser window.

So, if you work from an Internet cafe, to the computers in a waiting room, or a hotel computer, you can work in your own desktop and when you are done close the browser and not a single trace of anything you did is left on that computer.

To register for your own desktop you should visit Desktoptwo.

On this desktop you have access to a virtual hard drive complete with 1GB memory, use your own POP mail account or use the one provided, a website editor and a blog facility, an RSS reader and more.

Desktoptwo introduce this desktop service:

Desktoptwo is a free web-based desktop or webtop (some call it a WebOS, although we feel that's a bit premature... for now) that mimics the look, feel and functionality of a local computer, all contained within one browser window and fully accessible from any Internet-connected device.

You can run this service on any operating system as long as the browser have the capability to run plug-in flash, acrobat reader, Java and allow pop-ups for this site.

I have been trialling this service and it is really good to work on your own desktop but on any machine.