Shane (Tube !) I got a Jamie Oliver Pizza Stone in heatons last year - the recommendation was to leave it in the oven so that subsequent incidental heatings would toughen it - It broke after a while - so don't get one of those !!
I also bought the river cottage bread hand book[/url:202cto5c]- a lovely little book - would offer to loan it to you - but I refer to it frequently enough - in that they go as far as recommending throwing a patio slab into your oven !! (Incidentally I have some to spare should you want to try it !!)
Shane (Spud !)
I did a fair bit of research on pizza ovens @ a year ago - pulled down some free plans & what not from the net - a lot of the sites recommended the bread builders book[/url:202cto5c]
I have this at home - it's a good read - (haven't get to build it yet though !!)
you can borrow it any time - there's some good design sections in it - how to's - reasons for etc. and some interesting history & stuff