I don't have one yet but have been asking a lot of questions and getting great answers. Hopefully I can help answer some questions! If you have more ask them up, I'd like to glean as much as I can from this discussion
>where did everyone pick theirs up for the cheapest?
There doesn't seem to be one place to grab these up cheap. For some reason they aren't falling to much in price. There was one webstore which had them for $199 after $50 rebate but it expired on the 5th and they're now on there for $270+. I'd recommend keeping a keen eye on ebay, pricewatch.com, and techbargains.com (great site if anyone doesn't know about it!).
If anyone has a great lead on where to get these cheap I'd love to know as well. FWIW, someone else mentioned a few days ago that Nomad/Creative is going to put to market a few new recorders this fall (maybe? can't recall exact timeframe). This means either a new version of the JB3 we can use or that the JB3 will go down in price a good bit for being "outdated". I'm guessing that they won't make another unit which we could utilize for taping, just a guess going on what is "new and hot" in that market and digital recording doesn't seem like a real driving force for sales.
>power supplys?
Power has been flakey! Anything external cannot be trusted apparently. There are two battery bays internal on the unit, when you have 2 in there it can run for like 5-7 hours I believe. With one you only get about 2.5... you'd have to purchase the second battery and they can be found from $35-50 on ebay and the like. Again, if anyone has had success in using something external it'd be neat to hear about!
>different sizes?
20 and 40 gig versions available. I think everyone agree's that the 20 is more then enough for what we do and that 40 is too much of a diminutive return for your $$. What is cool that if you have two you could use one to tape and one as a vault for archived stuff until you can get it onto a computer. You can go from JB3 > JB3 now..
Hope that helps!
Nick