I just found this jetBook review on NewEgg website (posted today):
http://www.newegg.com/Product/Produc...82E16858723004
Tech Level: somewhat high - Ownership: 1 week to 1 month
XXXXX Nice reader!
This user purchased this item from Newegg
Pros: Good battery life, no screen flicker when transitioning pages (like e-Ink readers), now comes with updated firmware (so disregard the firmware cons in other reviews-- that no longer is an issue and it comes out of the box supporting all the advertised formats). The SD slot is nice, I ordered a cheap 2 gig SD card and when all is said and done, the 2 gigs plus the 64 megs on the device should be able to hold hundreds of books. My entire 800-1000 ebook collection could fit on here. I love being able to switch between portrait and landscape, and the page turn buttons are intelligently placed. I don't have problems hitting buttons I don't mean to. Looks great as long as you have light, and is easy on the eyes.
Cons: PDF support is weak. When I loaded a PDF, it was very small; when I zoomed in, once I got zoomed in far enough to read, I had to scroll side-to-side as well as up and down to see the text, which really bugs me. To get around this, I just downloaded Calibre (google it) and converted my PDFs into FB2's and they look great.
No support for LIT files (must convert with Calibre).
Other Thoughts: Overall very pleased with the device. I've read two books on it already, and had no eye strain.
Also to note, for some reason, copying to the SD card I put in it seems to be much faster than copying to the device. I'm using the same USB cable on the same plug and the card is faster than the actual device... kinda odd, but no biggie, I just put all my books on the card instead.
The best formats I have found to go on the device are RTF and FB2. I have not tested MOBI, but have tested TXT, PDF, RTF, LIT, and FB2, and FB2 is my favorite with RTF coming in a close second.