Aha! That reminds me!
To get two finger tap + scroll, download and install this - http://code.google.com/p/two-finger-scroll/downloads/list
See this for more info - http://www.aspireoneuser.com/forum/viewtopic.php?f=6&t=6010&st=0&sk=t&sd=a&hilit=two+finger+scroll#p39726
I use it on my aao and it works beautifully, but make sure you disable all the side scrolling crap that synaptics supplies.
EDIT - Also, if the buttons are on the bottom, you end up with a trackpad that is waytoofreakingsmall. As proven by the Lenovo S10 and some others. In reality they're not hard to use at all, they just take a few minutes of use to get used to, much like the smaller keyboard.