I cancelled my pre-order for the Google Nexus 7 tablet... no memory card support. Boo!
When I called to cancel my order, I voiced my disappointment to the Google CS, his response indicated the lack of a memory card support was a common complaint but in Google's defense (his words), the tablet was designed to be a cloud device. I then mentioned that if I was traveling, the "cloud" may not be available/affordable and would therefore render the tablet somewhat unusable. The CS person agreed and was unable to come up with an adequate response.
I am going to wait for the ASUS MeMO 370T Tablet, which is pretty the Google Nexus 7 with memory card support.