How to get an iPod to work in my 2007 non-Sport Honda Fit?

Can you not plug the cable going to the XM radio into your iPod?

Does your factory radio have a tape deck (very unlikely, but maybe you might get lucky)? There are http://www.google.com/products?q=ipod+cassette+adapter&oe=utf-8&rls=org.mozilla:en-US:official&client=firefox-a&um=1&ie=UTF-8&ei=J35YS7eyFo_WNrzUtN8E&sa=X&oi=product_result_group&ct=title&resnum=3&ved=0CCUQrQQwAg that you can either make yourself or buy off the internet. In my experience, the quality is only slightly better than those FM adapters, but it's a lot more consistent - no drop-outs or interference.

http://www.sowbug.org/mt/2006/07/honda-fit-aux-jack-installed.html is the first hit on a Google for "connecting an aux-in to a 2007 honda fit non-sport". It sounds quite involves and the author says "As I said earlier, don't do this."

You can certainly buy an aftermarket stereo with front AUX inputs for less than $100. http://www.crutchfield.com/app/car/carselector.aspx?s=0&cc=01&lp= has a pretty detailed stereo selector that lets you select from a bunch of different options, including built-in iPod controls.

This http://www.usaspec.com/product.php?ProductID=29 looks promising, and http://www.fitfreak.net/forums/fit-i-c-e/7053-fit-ipod-questions.html without the work of removing the head unit. I'd second checking out http://fitfreak.net.

I installed a USA Spec adaptor in my Toyota Matrix a few years ago. I did have to pull out the factory installed radio, plug in a cord into the back, and snake the cord down the side of the car to the adaptor box that I tucked just underneath the plastic shield on the left side of the passenger seat leghole, and then push the radio back in. It was actually pretty easy; I got good written instructions from Crutchfield (and a replacement one in 2 days when the first one had a crushed input hole; the replacement one has worked like a champ for four years.), and they were available on the phone to walk me through it if I ran into trouble. I had never done anything like that with a car radio before. The USA Spec adaptors often have two output places for cables; I've hooked up cords for my ipod and my xm Roady, and ran them up the side of the passenger leg room hole and up to where my xm and ipod sit when in use. My adaptor and car are a few years old, so all I can do is use the car stereo to switch between XM, ipod, the cd player, and very occasionally local radio - but it's much nicer than having to plug and unplug cords to change input media; as a bonus, they seem to be able to pass data/control back and forth now. The quality of the sound is much much better than a FM modulator.

I have the same model of Fit from 2007 and there's a music link (jack-in) right below the console, in front of the cup holders. Does your Fit not have this?

Last year I installed an auxiliary input in my car using a wired FM modulator, presumably similar to the one you have for your XM radio. Wired modulators are miles better than wireless ones, since they can disconnect the antenna from the car radio when you are playing auxiliary audio through them, thus eliminating any interference. I have absolutely no complaints with my setup -- no interference, no distortion, and to my relatively picky ears everything sounds great. Since you already have the wired modulator in your car, I'd say that you just need to figure out a way to take advantage of it. Perhaps you could install an audio switcher on the input to that modulator so that you could switch back and forth between your XM radio and your iPod.

KokuRyu: there's no Aux jack on the base US version of the Fit. It's only on the Sport model. (Which is why I bought a Sport; the base model wasn't much cheaper and you got a lot more with the Sport)