Japheth,
"Are they anybody building a chassis currently?"
Yes plenty of builds in progress have a look here:
http://www.haynes.co.uk/forums/showthread.php?t=4393
It's a thread with alot of links to builds in progress and completed builds, diaries, blogs, gallaries etc.
There are also plenty underway which are not so public (mine for instance).
So all in all there is plenty of experience and advice on this site for when you get started.
Here's something that can be very helpful: In your profile you can add a location and this will appear in the details in the top right of your posts. Need not be too specific, but it helps if you have 'special needs' e.g. there maybe country specific legislation or some one near by may be able to lend you a 'wot not do dah' if they have some idea where you're based.
Welcome.