B&N Nook Tablet vs. Amazon Kindle Fire
Your local library may offer e-books you can read just fine on a Nook, the Canberra library system does. All you need then is a friend in the US with a credit card ;-)
Ask Slashdot: Chromeless Cross-Platform Browser?
Look at CEF: http://code.google.com/p/chromiumembedded/
It lets you self-host a HTML widget(s) and works on Win32, OSX and Linux. Its a wrapper around the Chromium browser, I use it in the Steam client for showing web pages in our thick app.
Mathematical Analysis of Gnutella
You have missed the point of the paper. The N=4 and T=5 values equate to a maximum reach of 484 clients for a query. To reach "napster" sizes of 1million you need T=7 and N=8.
That explains the different numbers.
However, I do agree that a couple numbers seem to be plucked from mid-air, but the argument and maths seems fine :)