It's interesting: Over half of the respondents (19 of 32) who purchased Kindles so far had some sort of dedicated reading device already, and most of them were Sony Readers. (15 of that 19). I also note that none of them had iLiads.
This suggests to me that Kindle has something very appealing to people which the Sony Reader lacks. Is it the keyboard? The EVDO wireless? Just the "new gadget" lust we all know so well?
What is it that's drawing you to the Kindle over other devices?