The IR-909, a simple but lovely-looking Roland TR-909 drum machine clone, is now available for the iPhone. Description:

IR-909 is a drum machine for the iPhone inspired by the Roland TR-909. IR-909 features a 16-step sequencer, 4 patterns and 8 different drum sounds. IR-909 includes individual pitch, attack and length controls for each sample. By default IR-909 comes with 6 different sample packs, these include the original TR-909 pack, TR-808, TR-707 and TR-606 packs, plus two additional ones called "Tech House" and "Kärv".

This isn’t without some caveats. Reader Todd notes that it lacks pattern saving, audio export, and audio import, and tempo adjustment is a bit crude. Then again, it’s available, it works (apparently), and maybe we’ll see some other adjustments in the future. US$4.99 via iTunes.