As the reader may know, the version of Google Maps on the Pre doesn't understand UK postcodes. Google doesn't seem to be in a hurry to fix this.

IANAdeveloper, but It strikes me that it might be quite easy for a small app to take a postcode, look it up using Google's APIs (because Google Maps on every other platform is fine about postcodes), translate it into a lat/long, and then feed the lat/long to the Pre's Google Maps app.

I, and I imagine a large proportion of UK users, would be eternally grateful. We'd probably be prepared to pay for it as well :-)