One thing to keep in mind, these things do tend to drain the battery, even when not in use, so if you're going to use one as a spare, make sure they weren't charged up at the same time or you might ended up with two dead Readers just when you're getting to the interesting parts. Mine has sat dormant for a few weeks while I read a few PB's I couldn't get in e-format and I was quite surprised at how relatively quickly the battery drained while it was just sitting there.
BTW I'm glad you were able to pick up a spare and quite shocked at the jealous response a few people cropped up to your original happy/light-hearted post. My extra should be at the post office by now, have to make sure I stop by and check today (the wife is stoked!).
