Is the ATI Mobility Radeon HD 5470 Supported?

Hey all,

Pretty much what it says on the tin, I've been looking around and the majority of post's I've found all say that there is no support for it as of yet and there around 4-5 months old so would like some advice about if this graphics card is supported and if I will be able to achieve my native resolution 1366x768.

If I was to Install OS Snow Leopard and this graphics card isn't compatible what would I get on screen? Would it be usable or not?

My Specs are

Dell Inspiron N5010
Core i5 M 430 2.27
4Gb Ram
ATI Mobility Radeon HD 5470

Any help is much appreciated!