thanks! the reason I'd root it is to install the Kindle app and a reader such as coolreader or fbreader. The purpose would be to have easy/stremalined/seamlessly integrated access to many more stores than the sony store. Nothing else. Not interested in a tablet, which does very little more than my netbook does, and does not allow me to read for hours on end on the beach.
If there are users still reporting slugginess, slow response times and instability, then I'll think twice.
thanks everyone!