I approached Anthony, a long-term Darkwind player with a talent for texturing vehicles, to see if he’d like to get involved as the texture artist in Block Rockin’. So now there’s a team of two 
We’re working on a number of themes (Neolithic, Circus, Deep Space, etc.) and therefore different textures for all of the game objects for each of these themes. I have also purchased some music from the excellent Shockwave Sound archive. It turns out streaming music on the iPhone is quite a drain on its puny resources however, so we’re stuck with 30-second song loops.