Bear with me, but I am wondering if it is possible to run an X session from windows 2000 to my linux box?

Where I used to work we did ahve some commercial products that allowed this to Sun platforms so I was wondering whether I can obtain a free/shareware widget for Windows that will do the same thing for linux? And/or whether anyone could recommend a specific widget that is relatively straightforward to work out (I still wear my linux N00b badge with pride).

Basically I only have room to place my laptop in a docking station without a monitor and at the screen resolution I run on my PC I could feasibly dedicate half the screen to an X session on my monitor leaving the rest for winbloze gubbins.

If you're thinking about a session from remote machine, you can do a similar thing (run Linux applications) using VNC.
I know about commercial programs allowing to run an X session from WIndows, but I don't remember any free one.

That VNC (http://www.uk.research.att.com/vnc/) looks like just the ticket for what I am looking for, not to mention it looks like it might be well handy at work as well, thanks for that.

There have been many threads on a similar nature... just search for VNC and you'll find loads. There are problems with VNC... apparently it basically takes a screendump and sends the image over the network, which makes it quite slow and unresponsive. You can set up your Linux box to have an X session over the network, and there are Windows clients (X-Win32, for example) that can connect to it. I haven't use it (yet) so I can't say how responsive it is, but it's got to be better using only 1 set of servers/clients than 2!