I am due an upgrade for my mobile phone, and would really like a smartphone.
Everyone I know has an iPhone, and I am looking for a bit of originality.
I have looked into the Google Nexus One, which as yet has no release date announced for the UK as far as I am aware, and also the Sony Xperia X10, but the same, no release date.
Are there any other phones that people can recommend?

I am interested in the Android system, which is supposed to become the ''new technology'', and would appreciate any advice (or accurate release dates).
Many thanks for any help.