Cool Repurpose HTC HD2 as wifi only music player/tablet?

Hi Everyone,

Now that I have a shiny new HTC One X I am looking to repurpose my much loved HTC HD2. I think this will be the case for many people here so would like some ideas on how to best use my old HD2

I would like to run it as a music player/tablet much like an android based ipod touch or android tablet where there is no phone functionality or sim required only wifi connectivity.

Does anyone know of a ROM suited to this at all?

Currently without a valid sim and network I am unable to download apps from the play store.
Really it probably needs to be a rom based on a tablet i think....

Any ideas much appreciated.