I'd like the dictionary feature, myself. I'm already looking around to see what my next ebook reader will be. If Sony offers this feature in the future, I may not even change companies. However, that HTML support in the Cybook would be pretty useful. Is it easy to look up words on the Cybook? I noticed it doesn't have very many buttons. Can you scroll to the word you want to look up on the page?
As for the Kindle, its extra features are all but useless to me. The QWERTY is nice, but I don't often feal the urge to make notes on my books immediately on my device. The internet access is useless to me for at least the next 2.5 years while I'm based overseas and I doubt I'd use it very much when I'm back in the states because I'm averse to paying for content that is free through a regular internet connection (i.e. newspapers and blogs). Given this bias, I support any decision to ditch the Kindle.