Pentax Optio M40 8.0MP Digital Camera??

i was thinking about getting a Pentax Optio M40 8.0MP Digital Camera, does anyone have it and can you tell me if it's good or not. can you also tell me what memory card it uses? thanks

only has one customer review on amazon.
http://www.amazon.com/Pentax-Optio-Digit...

but it is 5 stars.