Taking Notes On The iPad

TrueKeyboard Lite is an enhanced "Notes" application which brings a real keyboard back into your hands. With its realistic look and sounds, you’ll feel like you’re typing on your PC. TrueKeyboard Lite is featuring a Universal Keyboard layout,
Using the method of long hold on a desired key, which opens a window 
with all the possible options of that note or symbol, in most keys.

TrueKeyboard Lite gives you PC keyboard capabilities, complete with those keys that you miss most, like the arrow keys and a dedicated number pad (by clicking on the #+= key).  

The "lite" version is free and there is an upgrade to the Pro version for $1.99.