Kindle 3 very good including browser, but note:
1. It can lock up, frequently, especially if web site is complex. Best to enter URLs into Kinstant website, let that re-direct you to the mobile version, then "bookmark" the resulting URL! You can always get the full web page verison if you really want.
On one occasion, my Kindle locked up competely, and so did "restart" ! I had to use "last ditch unlock", factory restore with no keys working, which worked, but it de-registers the deivce and wipes the memory clean !
2. Whispernet exists "on top of" other wireless systems as a VPN. During busy periods, Amazon may switch you from 3G to EDGE and GPRS, which still work but are much slower.
3 Loads of entirely free books from project gutenberg & web archive texts, and - not entirely legal - novel packs u can get via torrents etc,,,,,, if a book is in mobi format the Kindle will directly download it, but PDFs need a computer then USB connect .......
.... I find it very good indeed, for all sorts of website browsing and old out of copyright books. Not so good if you want video, and latest blockbuster novels .......
few tips ...... only one browser window so no page re-direct - but you just enter the website url via KINSTANT then it DOES work .......
.... goolge translate works a treat, read mobile.lemonde.fr in English translation, & other papers etc ,,,,,,,