I think it depends on whether you intend to download books away from your internet connection. Generally most people would use their home internet to download books and then take their kindle away with them. All the 3G does is allow you to have a remote internet connection away from your home allowing you to download books whilst travelling on a train or bus or in a car.
Yes you can get on twitter with a kindle 3g.
3G for Kindle is the 3G service, known from smart phones, 3G enables you to have internet wherever you go. So 3G on the Kindle means you can take your Kindle anywhere being able to download book, browse the internet, etc.
Yes, the Kindle (I have the K2 International) does have 3G connectivity.
Kindle 3 is better because it's free if you get the 3g version.. and k3 is better then nook black and white in contrast since it's newer, so reading online is better - also, nook does not have text to speech. Text to speech makes internet much more fun... Nook color has no 3g, just wifi.
yes
No, you do not have to have a server for a Kindle, but you do need to use it via a wirelsess cable or a 3G connection.
The iPhone 4 is better than the iPhone 3g. It has the capability of operating on a 4g network, which eliminates the problems you've been having with the slowness of the 3g model.
Yes,You can type on a kindle and kindle 3G. Its touch-screen and has a keyboard. Its like a IPad but on a IPad you can play games but on a kindle you can only read.
Yes, the kindle has access to AT&T's international 3g and edge And you can access by Wifi either.
A nook and a kindle are the same thing that do the same things. HOWEVER... one has more than the other. If you are interested about the books rather than just the 3G features and games and such, the nook (by Barnes and Noble) has more than 2 million books available, some of them are even free. The Kindle (by Amazon) only has around 700,000. The kindle has free 3G everywhere you go that connects to the internet, but the nook has 3G for buying books in its store. The nook also has a lending feature so you can borrow or lend books that you buy, and even check out books from the library from the comfort of your couch.
Try mail.live.com/m/
The Kindle3 Graphite Wi-fi (6" display, international) is $139 The Kindle3 Graphite 3G + Wi-fi (6" display, international) is $189 The Kindle DX 2nd Generation 3G (9.7" display) is $359 The latest generation Kindle 3G (9.7" display, graphite) is $379. In the US, the item ships for free with Super Saver Shipping. Bear in mind that in many countries (except the US) you'll need to pay import duties (I sent it to an Eastern European country back when the price was 255USD and the recipient paid the equivalent of 55USD in duties). And you have to buy the books to download onto it but they are only about $10.00 or so. And there is free Wi-Fi, so you can buy a book anywhere. I have one and I love it. :)