Sony has submitted a new design for a miniature laptop to the FCC, and it's similar to it's classic subnotebook, the Vaio Picturebook. It even inherits its model naming scheme, PCG-XXXX.
From the documents, it appear there will be a PCG-1P1L and a PCG-1P2L, each running Windows. EVDO/3G WWAN, bluetooth and 802.11bgn radios were tested; one report indicates they're connected using PCIe, which will make for easy swaps.
The only photo is of the back. It's about the same 9-10" length as other netbooks, but markedly less deep: an extended widescreen aspect ratio could be in the offing. This could resemble Intel's prototype MID devices, but there seem to be hinges there behind the battery slot, suggesting a netbook or UMPC-like clamshell form.
A few days ago, Sony confirmed to us that the UX series of MicroPCs weren't coming back: here's why.