Sending iphone data wireless to a car head unit?

My car pioneer head unit plays my music and displays artwork from my iphone but i have to connect it by a USB lead into the front of the unit, is there a Wi-Fi USB dongle i can use to send the music by Wi-Fi to the head unit or a sender and receiver i can use instead of a USB lead?

How to hold iPhone whilst using Runkeeper app?

I use the RunKeeper app whilst out running and walking. I was wondering how you hold it, in your hand, attached to your arm, attached to your waist etc? I run with my phone in my hand, is that okay?

How to send a text with no credit or no Wi-Fi?

I got this really important text and i need to text back but i have no credit or Wi-Fi and there's no other way but texting to contact this person and i was wondering if there's a way to text them and i have no money 2 got credit to text them btw i have an IPhone 4 if that helps in anyway

Why can't my iphone access Wi-Fi?

I bought this iphone 3G from someone off the street and I go to Wi-Fi networks and none appear not even my own router but my internet works fine on my laptop

I want to adjust the volume of a ringtone in my iTunes?

I just created a ringtone using an iPhone application. I made it an m4r file all that, but the volume is low when it plays, even when the volume is at maximum on my phone. This is especially noticeable if you listen to my other ringtones.

I figured I could adjust the volume by right clicking the file, click 'get info' and adjust the volume from there. However the volume bar to control the function is totally grayed out. Is there any solution? Help would really be appreciated, it's a pretty bad *** ringtone apart from it not being loud enough.

Added (1). This is what it looks like. The volume adjustment bar is there, i'm just not allowed to use it?

IPhone users, how much do you pay a month?

I want to get the iPhone 5 when it is released and I would like a rough estimate of how much you pay a month. I'm aware that obviously depending on the plan/contract, the monthly charge with differ. But how much do you pay a month, and what features do you have?

Also, if you are at home or somewhere where there's Wi-Fi, and you are using the internet, do you get charged for that or is it free because of the Wi-Fi?

What do if I just saw a cockroach on my bed like 5 minutes ago?

I was laying on my bed watching something on my iPhone, then I felt something crawl on my arm and I look, I saw a cockroach right below my arms, I totally freaked out. But I killed it. I don't know if there's anymore so I'm scared to go to sleep. It was like a medium cockroach a little bit big.