Cables
First, cables are being made by Dan Guisinger, (DanMN101 on EFnet #i-opener-linux) who is located in Minnesota. He's charging $18 for him to make you a custom IDE cable that will allow you to hook up a 2.5" laptop hard drive to the iopener internally. The cost is so high because the cost of the connectors at each end of the cable is a high, fixed price. For ease of payment, he's using PayPal. Go to that site, sign up using his referrer, which is his email address: danrg@mn.mediaone.net. He will then give you a $5 discount, so only send $13 once you have a credit card on file with PayPal.com. Put your address in the comments field of the 'send payment' form, and you've got your IDE cable for $13, if you refer him when signing up, $18 if not. He'll be shipping the first cables at the end of this week.
FAQs, Info Pages, Etc.
Misc
Here's a link to a product that does USB audio out, giving you a standard mini audio plug via USB. BEos and Windows 98 currently support USB audio out.
The following are supported by linux as usb-->ethernet adapters: Dlink 650tx, Melco LU-ATX, SMC 2202USB, Billionton USB100, LinkSys USB100TX. All are available at buy.com
here are some possible solutions for mounting the iopener in your car.
here is information on beos, which will be a free download in about two weeks.