I never did get an iPod to headphone jack conversion. However, my needs were satisfied with what i did get. Basically I adapted my car iPod dock to work with my iPhones. I got the following charger converter and connected it to the dock in the arm rest of my car.
Charge Converter:
http://www.cablejive.com/products/dockStubz.html
Then I got the following dock extension cable and plugged it into the charge converter.
Dock Extender:
http://www.cablejive.com/products/dockXtender.html
The charge converter is because older iPods charge on different pins in the connector than the newer iPods or the iPhones. My car was made for the older iPods. The dock extender is what allows me to connect my iPhone to the car stereo system. I can play music through the system, seek through songs using the car stereo, and charge my phone at the same time.
The downsides are:
I have to choose what playlist/album/songlist I want and start it playing before I plug it in. Because the navigation through the songs is just to the next, or previous, songs. Also, My stereo system doesn't read out the song name or anything. It constantly displays something like "CD 6 Track x" and gives the track number. However, the track number only goes up to 99. If you have more than 99 in a playlist, than it will skip song 100 and play song 101 and label it as track 1. AND the iPod app in the iPhone just displays a message saying that the application is using an accessory, and it doesn't display any information about the tracks either.
I can, and do, work around the downsides because on long trips, it really helps to be able to just set a long playlist and let it go. Also, Pandora works on it too, and that I can control on the phone. The 2-ft cord that I got is planty of room for me to answer a call too. One thing that I do like is that if I get a call while listening to music, it will fade out the music and play my ringtone until I answer it, and then it will fade the music back in where it left off when I hang up. (Just like if you were listening to music using the headphones.) With 2-ft of cable, it's not so long that it gets in the way either.
I highly recommend the dock extender cable, because it can come in handy for as long as you have an Apple product basically. If you aren't sure about the charge converter, get the dock extender, test it out, and if your device doesn't charge, then decide if you want to spring for the ability to charge your device while using it.
I hope this all helps.
Timmy J.
Ps. Thumbs up to Windows 7 Ultimate and thumbs down to Mac

Charge Converter:
http://www.cablejive.com/products/dockStubz.html
Then I got the following dock extension cable and plugged it into the charge converter.
Dock Extender:
http://www.cablejive.com/products/dockXtender.html
The charge converter is because older iPods charge on different pins in the connector than the newer iPods or the iPhones. My car was made for the older iPods. The dock extender is what allows me to connect my iPhone to the car stereo system. I can play music through the system, seek through songs using the car stereo, and charge my phone at the same time.
The downsides are:
I have to choose what playlist/album/songlist I want and start it playing before I plug it in. Because the navigation through the songs is just to the next, or previous, songs. Also, My stereo system doesn't read out the song name or anything. It constantly displays something like "CD 6 Track x" and gives the track number. However, the track number only goes up to 99. If you have more than 99 in a playlist, than it will skip song 100 and play song 101 and label it as track 1. AND the iPod app in the iPhone just displays a message saying that the application is using an accessory, and it doesn't display any information about the tracks either.
I can, and do, work around the downsides because on long trips, it really helps to be able to just set a long playlist and let it go. Also, Pandora works on it too, and that I can control on the phone. The 2-ft cord that I got is planty of room for me to answer a call too. One thing that I do like is that if I get a call while listening to music, it will fade out the music and play my ringtone until I answer it, and then it will fade the music back in where it left off when I hang up. (Just like if you were listening to music using the headphones.) With 2-ft of cable, it's not so long that it gets in the way either.
I highly recommend the dock extender cable, because it can come in handy for as long as you have an Apple product basically. If you aren't sure about the charge converter, get the dock extender, test it out, and if your device doesn't charge, then decide if you want to spring for the ability to charge your device while using it.
I hope this all helps.
Timmy J.
Ps. Thumbs up to Windows 7 Ultimate and thumbs down to Mac