You can download the Reina Valera Gomez for a few of the handheld items.

CrossWire Mobile - This has been recently brought to my attention.  This should work for iPhone, iPod, Android based phones, PocketPC, Windows Mobile, Nokia, and a few others.  You should be able to get the RVG for these as it is in the CrossWire project.  It is outdated, however we hope to have it updated very soon.

Palm Bible Plus - Download the module here.

Go Bible - Download the module here.  Red letter edition here.

Pocket eSword - This is no longer being developed, however you can get the module here.