Quinny: For those like me still waiting
http://www.nzherald.co.nz/technology/news/article.cfm?c_id=5&objectid=10584354 which bascally says get $600 free credit on XT if you buy the phone outright and sign to an expensive plan.
This is being discussed here (we actually posted this the moment it came out). The "expensive" plan actually includes free 240 MB a month as well, for 24 months.