What unlocked phone can work for boost mobile?

I want a nice phone. Does anyone know which phones can be unlocked for boost mobile?

a boost Mobile Starter kit [available on www.boostmobile.com with free shipping for $19.99 with $10 call credits] will work in a nextel handset

boost mobile launches $50 unlimited talk, text, mms, web, walkie talkie on 1/22/09 – works with all boost mobile walkie talkie compatible phones [including the nextel ones]

Sanyo Incognito (Boost Mobile) – UnPaking