After quite a bit of waiting, Sony has jumped on the ultrabook bandwagon with the new Vaio T13 Ultrabook. If you've seen other ultrabooks this really isn't anything special, as it's just Sony's take on the spec. One interesting feature is the option for a hybrid HDD/SSD instead of just an SSD. If you select this option, Sony pairs a 32GB SSD (which is "dedicated for system responsivess and not available for storage") with a 320GB 5400rpm HDD.
According to the announcement, the new ultrabook packs a battery that will last you up to 9 hours of usage, which is not too shabby. It has a surprising 90 days of standby time, as well, so this is a laptop that you can throw in your bag and never worry about it until your drain the battery from usage. It also includes handy USB features that allow you to charge devices while the laptop is asleep or off, which comes in handy when you're traveling.
The body is made out of aluminum and magnesium, and it goes for the whole brushed look. Dimension-wise it's about 226mm x 17.8mm x 323mm, and weighs (with the standard battery) 1.6kg. For ports, everything is more or less standard. One USB 2.0 port and one USB 3.0 port (the USB 3.0 port is the one with the USB charge feature); one VGA port, which is fairly surprising but usually useful; an RJ45 port for ethernet networking; one standard 3.5mm headphone jack; and a built-in SD/MMC reader.
Release is expected for early June, but pricing has not been announced. All in all it looks like a pretty standard ultrabook, if not just a little underpowered. The specs, taken from the announcement, are below. Read the announcement here.