[AthenaAtDelphi]

Originally Posted by jphphotography

(...) however since certain ones are already taken (ie Alt+Q for the number 1, w=2 etc) perhaps shift+alt+q?

You're right, of course .
So, a better suggestion would be :

To change the way a web page is displayed on the Kindle :
W : fit-to-width
Shift + Q : 150%
Shift + W : 200%
Shift + E : 300%
A : actual size
　

Originally Posted by jphphotography

I'd also really like a shortcut to get to the browser from the homepage

There is !
Well, sort of .

At page 117 of the User's Guide :
"One other way of accessing Web Browser is to type in a word anytime from Home or any book, blog, newspaper, personal document, or magazine you happen to be reading. When you begin typing, a search box will pop up at the bottom of the screen, and you can use the 5-way controller to navigate to the right and select"
'go to' .

But you have to type in a valid address, otherwise you'll get an error message saying :
"Your Kindle is unable to load the requested page."

Not exactly a shortcut, but another way to access the browser is also mentioned on page 117 :
"You can also enter a URL in the Search box from the Home page. Type the URL and use the 5-way to select "go to" and then press the 5-way."