Nokia N-Gage (MMC) - Warhammer 40,000: Glory In Death (2006)
Some of the things I said about the Gizmondo apply to the N-Gage. However, it was marketed more as a phone than a gaming system unlike the Gizmondo which was marketed as.. well, I'm not sure what.
The game library for the N-Gage was actually decent though. I'm not planning to seek out an N-Gage out but there are a few games I wouldn't mind having. So I suppose it's ahead of the Gizmondo on the aforementioned list but below many others.
Now the N-Gage as a gaming platform isn't dead. If you own a recent Nokia phone you can download the N-Gage runtime and enjoy a variety of titles. As a cartridge based system (MMC format), the last game released was Warhammer 40,000: Glory in Death. I wish there were more RPG and strategy games for mobile phones. They fit the mobile format so much better than action games.