O2 online are not selling it anymore, nor over the phone as an upgrade. I had to go to an O2 store to purchase mine. So you will have to go for a ride out to find an O2 store I'm afraid!
The upgrade operator on the phone told me that they weren't stocking it anymore as an online product, probably because they haven't sold enough or that there were problems with them, she didn't know! I went to an O2 store and got mine, I was well chuffed! But that was 6 days ago, now I'm taking it back as it keeps crashing, losing signal and having to remove the battery and replace it to get it to work again, between 3-4 times a day, oh and also the headset I got with it only give sound through 1 ear piece not 2!
The device is great and I love it, but if it has these bugs for keeps, I'm not sure I want it that bad! Hopefully the froyo upgrade will help these niggles!
Hope this helps!
---------- Post added at 07:57 PM ---------- Previous post was at 07:54 PM ----------
By the way, wind has it that they are not bothering with the 2.1 upgrade, but skipping it to go all 2.2 before the end of the year, but this remains a mystery even to dell employees!