There are some rumours that Dell may be working on a mobile handheld device:
When asked about a potential Dell handheld gaming device, Vakharia reportedly "looked serious" and replied, "You know, that's definitely one that's on the radar screen, but we have no plans to talk about anything today." PC Plus reckons the device might turn out to be a souped-up Ultra-Mobile PC.
That wouldn't be entirely surprising, considering early promotional material for UMPCs showed the devices running Halo.