The PhD process is that you hand in your thesis in temporary binding. You actually hand in 3 copies. You have 2 examiners - one internal (i.e. part of the same department from which you are graduating) and one external (i.e. from another University, or in my case, from Shell). They then read your thesis and you then have your viva. The viva (I did mine in Feb this year) is essentially an opportunity for the exminers to ask questions on your thesis and for you to "defend" your work. After the viva the examiners make recommendations to the University exam board. These are

1.  Pass with no corrections (very rare)
2.  Pass with minor corrections (fairly common). You generally have 3 months to do these corrections and they are typos, minor editorial stuff, minor rewordings, etc
3. Pass with major corrections (getting more common due to tight timescale the research councils have imposed). You have 3 to 12 months to do these. They are the same corrections as above, but may involve some extra work - i.e. some more analysis of the data, etc. You do not need to be re-examined. This is what I got.
4. As above, but in need of a further exam after the work has been completed.
5. Pass with M.Phil. The work was not up to PhD standard, so you get an M.Phil.
6. Fail. This is very rare and is more a failure of your supervisors, who should not have let you submit the thesis in the first place.

So once you've done your corrections , in the case of 1 & 2, your internal checks over the final thesis and if they give you the go ahead you submit the final bound version to the University. With 3 both or just the internal might want to check your thesis before clearing it. 4 requires that you go through the viva process again. 5, you just hand in a bound version with some minor editorial corrections done.

 Does that make sense?

It is just about done. I need to test out the pages to make sure everything works well - it takes a lot of time I also need to figure out how to update the current site easily with the new features - it's not trivial!