Finally got everything together and tried a few devices. I rebooted the N900 before each test.

With no device were there any files matching /usr/local/sbin/i2* so I don't include that information with each device.

1. Irex DR800 ebook. Worked fine though I had to mount the device manually since it appeared as /dev/sda
2. Ritmo HDD SATA 2.5" enclosure with 250GB HDD. Didn't work. The drive didn't even spin up.
3. Corsair Flash Voyager 8GB stick. Worked, created nodes /dev/sda, /dev/sda1 and /dev/sda2 and correctly mounted VFAT partition /dev/sda1. I was able also to manually mount ext2 partition /dev/sda2.