thinking of buying a Kindle keyboard WI 3G what is the difference between that?

[TheTruth]

Hi, mona, no point in getting 3G Kindle now as they limit what web sites you can access (only Amazon store and Wikipedia are allowed.) The largest collections of free eBooks in the world are in ePub format which Kindle doesn't support but Nook from Barnes & Noble does. Nook eBooks store has over 2 million of paid books and about the same number of free public domain books. With Nook, you can checkout eBooks from public libraries - just need to get Adobe Digital Editions (ADE) software (free from Adobe site). If you walk in with the Nook to Barnes & Noble store, you’re allowed to read any available eBook for free while in the store via free provided in the store Wi-Fi. Nook allows for lending Nook books for two weeks thus if you have friends and family with Nooks, they can lend you their books to read.
The only models I would take into consideration are Nook Simpletouch from Barnes & Noble and the new Kindle Touch (non-ad-supported) that both cost $139. Ad-supported Kindle models show full page ads to you (and everyone around you) every time they go to sleep mode and also show 2 line ads right there at your home screen - so annoying that Amazon even released a software that for $30 can convert ad-supported Kindle into non-ad-supported one. Non-touch screen Kindle models are such basic stone age devices (with page turn lag, buttons, and black blinks/flashes on each page turn) that I would not even speak about them. Nook (unlike Kindle) supports eBooks in ePub format that is the universal format most used in the world. Current e-Ink Nook Simpletouch has the latest generation touch screen display, no page turn lag, it weights less, its battery lasts twice as long (two months on one charge), it has microSD slot and it doesn't blink on each page turn - much better than current Kindle 3 or Kindle Keyboard. Nook Touch is still better designed than even the new Kindle Touch with battery lasting two months with ONE hour reading a day with Wi-Fi off thus it's still twice as long as new Kindle's two months with HALF and hour a day with Wi-Fi off. It looks like Kindle didn't get any battery improvement in the new model, they only changed the test condition. More, Kindle Touch still flashes black on each page turn while Nook Touch reduces the flashing by 80%. Nook Touch and Nook Color (unlike Kindle) have microSD card slot to take a card (class 6 or above) up to 32 GB.