Toshiba officially launched 3 new tablets today, including the Excite 7.7. This is their 7.7" 1280x800 Super AMOLED Plus tablet that was shown a few times before (it was called the AT270 before). This tablet (which features a strong quad-core Tegra 3 CPU) is very slim (7.6 mm) and light (380 grams).
The Excite 7.7 will launch in June 2012. The 16GB model will cost $500.