Can anyone who ordered it give me an idea of how long it took you to receive it?
I live in the UK, and it took me nearly 3 months. Sounds like you're in the states, so can't really help you there.
Mine's now been running for nearly a year now, and is constantly on, and I have never (touch wood ) had any trouble with it at all I'm about 8Gb from filling my 500Gb drive up, so may be joining you, with the 640Gb...although am holding out for a 750Gb drive
Best of luck with setting everything up
ps, two tips that have caused my drive to stop working throughout the year:
1) Make sure you wrap electrical insulation tape (or a suitable alternative) around the circuitry of the SATA adapter, it can (and has with me) touched other components within your Apple TV enclosure and caused the drive to stop working
2) Do the above to the drive itself...I had an incident a few months ago, where my Apple TV froze..As soon as I took my drive out of the Apple TV enclosure it burst into life again, so all I could assume was, it was some of the circuitry on the bottom of the drive that was shorting out. I insulated it using tape, and have never had the problem again