A cheap tablet: CTL 2GO Convertible Classmate PC 8.9”

The CTL 2go™ Convertible Classmate PC with Intel Atom processor has a rotating screen which easily converts from traditional Intel Classmate PC netbook format with keyboard entry to a resistive touch netbook tablet. The included stylus allows control of the 2go tablet touch screen as well as digital pen text input. This convertible tablet functionality enables a world of new usage options for use and control of the 2go™ Convertible Classmate PC. You can also easily use it as an e-reader

http://www.2gopc.com/

You can also easily use it as an e-reader:
http://www.stevehargadon.com/2009/12/one-solution-to-proprietary-ebook.html