Thats a rather old article (2001!) Adobe reader for pocketpc has grown rather a bit (its now 7.5Mb installed). Its still slow and clunky, but displays rather well, and is quite usable. Unless its an e-book you are reading the text would likely contain tables and figures which would be best viewed with the native adobe pdf client.
Here's a pdf of the lifedrive on my VGA pocketpc.
LifeDrive Datasheet PDF
Surur