Series 3 is going to be release on 23/10/2006 on the same day a boxset of series 1, 2 and 3 should be release.

Also I noticed you can now buy series 2 on its own with some extras, has anyone got this, is it worth getting?

Link

Yep - iv got mine pre-ordered on play hehe.. the front cover seems bare and i dont see the point on bringing boxsets 1-2 and a 1-2-3 out!!
More money for them i presume!