Two feature suggestions:

1. Some audible indication if you receive bitcoins. Andreas Schilbach's wallet has a very neat 'tinkling coins' sound. Just something subtle. Would be a great addition in the user experience, I think (sounds crazy, but often I've heard "damn I love that sound of incoming coins!")

2. If you install Mycelium on a phone with European regional settings, use EUR as the default currency, instead of USD (as source, Kraken or BitcoinAverage are fine). There's always a lot of confusion getting newbies to switch from USD to EUR, especially since not only do you have to find and check EUR, but also uncheck USD.

Thanks for your consideration.