Ok, I gave in, I bought an iPhone 4 (not 4s).. Anyone recommend a killer app? something with a sequencer and basic synth, a bit like rebirth (I've seen it on ipad). For those interested, The Beta Zira units (links below) have shipped to beta testers today. Paul Zira demo - http://synth.net/m/sounds/view/Zira-Demo-Final Zira info - http://vacoloco.net/synths/zira/