I hate to say I told you so but I said ages ago that Play.com are NOT covered by any UK Consumer law, including distance selling regulations as they are based in Jersey not UK. Therefore, so long as they don't take your money, I think it is unlikely you will get your N800.

I looked on handtec and it still mentions OS2007 not 2008...

As another point I ordered my 770 from Expansys and it arrived not only the next day, but also when I rang up and said there was no foreign adaptor they sent that out by courier without question the same day and it arrived the next day. That is excellent service!