While you've been waiting for the "perfect" product, BKeeper, some of us have been enjoying eBook reading for the last 10 years or more

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Does it really matter whether eBooks ever become "mass market" or not? Reading is itself something of a "niche" activity, don't you think? There's a lifetime - heck, many lifetimes - of reading out there currently, with 10s of thousands of freely available eBooks.
My attitude has always been to enjoy life for the present. There will always be something "bigger and better" on the horizon. Devices such as the Sony Reader and the iRex iLiad make superb eBook readers. Why not use them now?