Toshiba today for our friends in Japan, this time bringing a few updates to the company's more lightweight Dynabook offerings. The S30 appears to be the more interesting of the two, if for no other reason than the promised 13.5 hours of juice from the laptop's "long haul" battery (we'll take two of those batts, thanks). That marathon battery life is made possible in part by the slow-spinning 4,200 rpm 30GB hard drive and low-power (in more ways than one) Core Solo U1300 processor, running at a sprightly 1.06GHz. You can bump up the hard drive to 40GB running at a speedier 5,400 rpm if you so desire, though you'll have to give up about two hours of battery life for the pleasure. On the other side of things, Toshiba's new Dynabook SS M36 opts for durability over longevity, with a ruggedized design that's promised to protect the laptop from falls of about two feet. The M36 also packs a bigger punch than the S30, with a Core 2 Duo T5500 processor powering things (or Celeron M 430 if you're looking to save a few bucks), 512MB RAM (up to 2GB), a 40GB hard drive, and a combo CD-RW/DVD-ROM drive. Look to get between 3.4 and 5 hours of battery life from it depending on the configuration. Both laptops should be available sometime next month, with the S30 starting at 267,750 Yen ($2,300) and the M36 running 197,400 Yen ($1,700) for the Core 2 Duo config.