I've started using my iPhone to pay for coffee and snacks at the local Starbucks and it's very cool. I love not having to carry around my card but instead have the information -- and prepaid credit -- neatly on my phone. I just won a new Starbucks Card, and am wondering if I can have more than one card in the "Mobile Card" app, and if so, how I do it?

I've got the chance to beta test a new game on my iPhone, which is awesome, but they want my IMEI number, and I am a bit clueless about how to find it. Help!?

This is a guest review...

When a developer sets out to design an app, it's my firm belief that they should concentrate on fleshing out the features that exist *first*. Only when those features are complete should new ones be considered. PolyTune is a great example of this. Unfortunately, it's a great example of what *not* to do.

That's not to say that PolyTune is all bad. In fact, it does exactly what it advertises, and quite smoothly. A single strum of your guitar, and the app shows six different indicators. One for each string, each displaying real time like a standard monotuner would. That alone is quite impressive. But I don't think that minor convenience alone is enough reason to buy this app. Especially with all the monotuner apps out there with a plethora of bells and whistles. And especially not with its $5 price tag.

That about sums up what's good about the app. And it pales in comparison to what's glaringly absent. PolyTuner does have some minor configuration options. Just, not many.

According to Apple, I can now use the "Find my iPhone" feature to make sure that I never lose my new iPad. Nice, but for the life of me, I can't figure out how to turn it on, even with the latest iOS iPad firmware updates. What's the secret, Dave?

I'm an addict, I admit it, I love Starbucks coffee. Complain all day about big corporate versus small business, but when I'm traveling, I really appreciate knowing I'll get a good cup of coffee or a tasty latte on the road. I'm an iPhone user and have a question for you: is there a way I can find the closest Starbucks drive-thru when I'm traveling somewhere new?

How do I create menu folders [ed note: actually you're talking about app folders on your iPhone / iOS 4 home screen] on my iPhone 4?

I know how to add new apps to my iPhone, but I'm not entirely clear how I update those apps when there are new versions available. Is this something I can do on my phone, or do I need to use iTunes to update iPhone apps?

I have the Facebook app on my Apple iPhone 3GS and like it a lot, but am wondering if there's any way I can manage my fan page while mobile, in addition to accessing my regular user account?

I've started reviewing Apple iPhone games and just had a game developer tell me that he'd like me to check out his game and sent me a promo code. I'm a bit baffled by this: how do I redeem a promo code for an iPhone application so that I don't have to pay for the game?

I just heard that there's a software update for the Apple iPhone 3G. I want it! But I'm confused: how do I update the software on my phone?

I just upgraded from a first generation Apple iPhone to a shiny new 16GB white iPhone and am excited to switch over completely. All my data, phone book, etc are on the old system, though, and I am perpetually anxious about first sync as I'm afraid that the empty phone address book will overwrite my huge address book data already on the computer? How do you clone the old iPhone and the new?

Now that I have a shiny new iPhone, I've gone a bit wild adding applications from the iTunes Application Store. So many applications that it's out of control. Now I want to delete some, but each time I delete them on the iPhone then hook the phone up to the computer, they reappear! :-(