greenteeth,
I agree with you on many fronts regarding the practicality and value of the E50. I have also told before that E50 may not be appealing in the category of connectivity due to its lack of WiFi or WCDMA. However, in certain social occasions, I would rather slip my E50 into my pockets than having an E90.
For the E90, in my opinion, is a good candidate to bring along instead of a notebook. However, the price is so steep that rivals some entry level notebooks!