The strange thing about the Gamepark is that it exists at all. However, its very existence is a testament to the weakness of other players in the handheld gaming world, including our friends at the late, great Gizmondo.
That said, there are two new Gameparks hitting the streets, the XPG and XPG Mini. The XPG has an SD card slot, Wi-Fi, and a DMB video tuner. The mini is much smaller and has no Wi-Fi. Both of them are open source and run all manner of games, including multiple emulators. The XPG will be about $300 while the Mini is about $150.
Gamepark XGP, XGP Mini Portable Game Consoles Announced [MobileWhack]