I joined over the phone a few weeks ago, I am not really sure it's of any benifit though.
The 10% discount seems ok but I am sure if you get on well with your local dealer you could probably push for that anyway.
I recieved my news letter but don't remember seeing anything about a membership number or anything like that, the trouble is Daystate are a pretty good company anyway and treat the owners well without having to join the club, I broke my magazine, (took it apart and lost the spring like an idiot) sent it off to them and they repaired it free of charge.

If you can afford the £15.00 then go ahead, if not then for what there is in the members area of their site I'd say save your money.

Rob.