HTC Desire :: 3 MMbile Data Allowance

My first thread, second post here... sort of. This is a great forum, been reading it all week, it's been very helpful making decisions.I originally posted this in someone else's thread as I thought it was on the same topic, but I guess now I look at it more closely it would require quite a derail to answer my questions. I hope it isn't wrong to quote myself like this, I don't want to spam. I've edited it slightly to fit better here: I should be getting my desire from three today (got a text earlier, it's late arriving), I was considering switching to t-mobile with their nice 3gb allowance on android phones but when i phoned up 3 they gave me a pretty good deal, and the 3 signal where i'm moving to later this year has been better than t-mobile. So far so good.However, I was under the impression that 3 had a 1GB fair use policy, which seemed it would be enough for me (I'm mainly worried about google navigation, I'm going to be a bit lost for a while after we move, I don't know the new area). I thought I'd better check, and now some sites I've found seem to suggest it has been reduced to 500mb per month since May 1st, though i can't find any official word anywhere.

Does anybody know the full story? It seems a bit of a stupid thing to reduce the browsing limit at the same time as changing all your plans to 'Internet Talker' and 'Internet Texter'. If the limit is 500mb, does anyone know how strict that limit is, ie do they only get annoyed if you go a large amount over the cap, or do you get charged immediately? Just to add, I did speak to someone in a 3 store about 5 days ago when I was checking out the handset in person, and he assured me that it was 1GB, though I then did the deal over the phone with the upgrades people. Does anyone think they might increase the limit to 1GB (if it is now 500mb) for me if i ring and cite this conversation? I was thinking that I might still have some negotiating leverage during the 7 days distance selling 'cooling off period' to get things changed.