Looks like Dell are trying to get into the market taken up by the Mac mini. The Dell Zino HD or as it has recently been rebranded the Inspiron 300 and the Inspiron 400. Dell hasn’t officially announced it yet, but dellzinohd.com seems to have info on the specifications.

The Inspiron 300’s are a bit vague. The motherboard being Intel UMA with all the standard ports(VGA, USB, Audio in/out). Intel Atom processor, 1GB RAM, 4-in1 memory card slot, 3.5" SATA HD and an Optical Drive

The Inspiron 400 will be powered by AMD Athlon or AMD Athlon X2, up to up to 8GB of DDR2 RAM, mini PCIe, WLAN, 4-in-1 memory card slot, Optical Drive(Blu-Ray Option) ATI Mobility Radeon HD 4330, HDMI, VGA output, gigabit ethernet and two eSata ports.

Will try and keep you updated with any more info if and when I find more.