Toshiba is celebrating the 25th anniversary of its first laptop with a second wave of mobile releases this month, following the various new models that we detailed a week ago including their first 3D-capable Satellite notebook. Two of the most interesting releases of the day are new Portege R700 13-inch thin and light system and the eye-catching new Libretto W100 UMPC that sports dual 7-inch multitouch screens.

The Libretto W100 is expected to become available in August, powered by a 1.2GHz Intel Pentium U5400 processor, 2GB RAM and a 64GB solid-state drive running Windows 7 Home Premium. The W100's dual 1024 x 600-resolution touchscreen design reminds us of Microsoft's Courier concept that was recently cancelled. The Libretto will carry a built-in sensor so that the dual screens can be used in both horizontal and vertical positions. One of the screens can also act as a full keyboard with haptic feedback. For those of you thinking running Windows 7 is going to be too painful on such a small footprint, an Android-based device is also being announced today. The AC100 netbook will use a Nvidia Tegra 250 processor, 512MB RAM and 10.1-inch LED-backlit display, claiming instant on boot ups and an eight hour battery life.

Finally, the Portege R700 is a customizable 13.3-inch ultraportable that can pack quite the horsepower for the size. Choose from an Intel Core i3, i5 or i7 CPU, hard drive or SSD, an optical drive comes standard, multiple USB ports, multitouch trackpad and HDMI support. The Portege R700's pricing can range from $999 to over $1700 depending on features chosen.