Sony Japan just released a software update for the PRS-T1 and PRS-G1 that takes you from 1.1.11230 to 2.0.00.15150 .
Here's the link:
http://www.sony.jp/reader/update/index.html
Here's what it says:
- Improves support for EPUB comics etc (don't ask me what "etc" refers to)
- Adds the Japanese bookstore Kinokuniya to available WiFi bookstores (currently in Japan you can use Sony, Rakuten, and Kinokuniya but Kinokuniya didn't have a button on the Reader until now).
- Other improvements to stability
Since I avoid Sony eBookTransfer on my Mac like the plague, they've nicely supplied standalone updater apps for Win & Mac. It installed without a hitch, but since I don't have any comic files, the only apparent differences I can immediately see are the additional store button and the new software version number itself...
(Kinokuniya is the button in the upper right. Apologies for the blurry image!)