Can everyone see my photos on iCloud?

My whole family has iPhone 5's and my brother set up iCloud on my phone. Well I forgot about it and today I sent naked pictures to my boyfriend (No, he didn't pressure me, I wanted too). After I took the picture I realized that everyone on iCloud might be able to see it cause it's in the photo stream thing and I can see some pictures that him and my sister have taken on their phones before. Does that mean they could see my picture!

Free site to watch movies on iphone?

I really like 1channel.ch but it doesn't work on my iphone. Plus my internet sucks and my computer is being stupid and it hardly plays.

Thank you so much. Btw I do buy movies after I watch them if I like them.

What is the cheapest plan for the iPhone 4?

I've wanted to get an iPhone, but my mom doesn't want to buy me one because she says $100 a month is way too much. I went to AT&T and once they said $100 a month she said no. I heard from one of my friends that there's a plan of $50 a month at AT&T. Is that the cheapest? What will the iPhone have with that plan? If you know please tell me.

Can i unlock a Sprint iPhone 5?

A friend of mine wants to trade phones for my Samsung galaxy s3 although I'm on AT&T and the iPhone is on Sprint. I want to accept the offer however I don't know if it'll support my network (I'm under contract so regardless if I use my phone or not it has to be paid) or if it can be flashed to something else like a prepaid network such as metro or virgin mobile.

Splitwise or Venmo for iphone?

What's up guys. I was hoping someone has some experience with the application Venmo. I'm curious, does Venmo only works from person to person both using venmo, or can it work for example me using venmo sending money to another person not using the application at all? Also, if you know about splitwire, would this be better than venmo? What would make both good and bad?

Verizon iphone 5 international use? - 1

I bought a verizon iphone 5 in the US and currently am using it overseas in Korea. I bought a SIM card in a Korean carrier which I'm using right now in my verizon iphone. My question is
will my phone use be billed to my verizon account or to my account with my Korean carrier?

What can I do with an iphone 5 that I can't with an iphone 4s?

Yes, 3g is slower on the 4s than 4g on the 5. But are there any features or apps that do not work or are not available on the 4s that work on the 5?

Added (1). As of January 22 2012, it appears that the Iphone 4s is capable of doing everything the Iphone 5 can do, just a little slower (less than 1 second slower in many cases ie, time to open an app). Nothing I can see that justifies paying more for the 5.
If you know of something that justifies paying more for the 5, please let me know.

Added (2). In response to (S.) 's answer, The reason siri isn't available on older iphones is because apple doesn't wan't it available. Those phones are cable of siri, and jail broken iphones 3gs, 4 an ipod touch 4th gen successfully have siri installed

Storing pics on iphone outside of camera roll?

Is there a separate place you can save photos that owuldn't be on your basic "camera roll" on your iphone? Like i have pics that i don't want with the rest of my pics if you catch my drift.