On this front, (cartopy)[http://scitools.org.uk/cartopy/docs/latest] can handle inter-coordinate reference system transformations via a spherical nearest neighbour interpolation scheme. On top of this, we have Frankenstein-ed the pcolormesh method to capture any non-quadilateral (or wrapping) data to allow plotting of data which might very well cross the dateline without a hitch.

I can put together some examples (sadly documentation is still lacking for cartopy) if interested.