Japanese E-books and Pocket PC

If you are interested in this subject there are an increasing number of sites out there. PDAbook sells books which are compatible with the T-Time Reader software which is bundled with many Pocket PCs in Japan and is specially designed for reading Japanese text. Kunikuniya also has a book store and I just came accross this interesting looking software, G-Book (see graphic below from the site), which seems to be a combination of multimedia, navigation and e-book software.

As a none native Japanese reader I wish that I could find a Japanese e-book reader that had a good integrated Japanese-English or even Japanese-Japanese dictionary.