Sorry to disappoint you but the "T" doesn't stand for tablet. After the N, X, C and E series, Nokia is venturing out to the T series. The T7-00 is mention under Symbian^3 devices as per the OVI publisher tools. The T7-00 seems to be somewhere between the N8 and X7. Expected features include 3.5mm headphone jack, a display resolution of 360x640 pixels (same as the N8) and a touch screen.
Since speculations are high, we expect the phone to have 16GB internal storage expandable via SD card, EDGE, GPRS, 3G, WLAN, micro USB and HDMI out. Hopefully the Symbian OS will be tweaked to take advantage of a gorgeous 4-inch display!
No price, release date or detailed specifications could be deciphered from the leaks.