I for one want to see a lot more technical and programming content. A key reason I bought this reader was to be able to carry scads of technical material from customer site to customer site in a very small form factor.
www.ebooks.com has a good variety of technical lit in PDF (I think it is DRM'd), but Connect is VERY light in this department. I don't mind paying for the books which can run well over $40 a pop in paper form, I just don't want to carry them around. I have sent an email to the Connect customer support about this, but have not heard anything yet.
I would also like to see periodical subscriptions available as eBooks. There are a lot more newspapers and magazines (no perfume samples) that I would read if I had them with me. (I would even accept Ad Pages - why not? I do in paper)
I have been an early adopter before, so I am not daunted yet, and there is enough to read for now to keep me interested. The Sony rep I spoke to at Borders told me more was coming, but I would love to know when.
ThomWill