If you have a windowns 7 laptop, there is a near 100% chance your laptop has a wireless card built in, meaning you can connect to the internet from any place that has WIFI (hotels, airports, coffee places, libraries, college campuses, book stores, etc..). If you want internet EVERYWHERE you go with little to no exception, you will need a wireless boradband card which is sold through Verizon, AT&T and T-Mobile. These go through cell phone towers, and the service is nearly everywhere in the country. There is a monthyl fee of $40-60 for mobile broadband cards.

The GPS in cell phones is more of a pain than it is worth. There are fewer antennas connecting to the satelites which means they are less accurate than a real GPS system (I notice lag and disconnects all the time on my iphone 3GS), and also it drains the battery horribly fast and is inconvient when a phone call comes. Also, if you enter an area will slow or no data service on your cellphone your GPS becomes useless. The maps are preloaded on a GPS not on a cellphone.

I find the cell phone GPS useful for navigating by foot in the streets of large cities though.

A camera with those needs wont be found for a price range of $100-$200
I really think you will need a DSLR camera because nothing on the point and shoot market (which is the $100-$400 price range) now has a large enough aperture to capture the low light and movement at a concert.
I was going to recommend either a Canon Rebel because they do take HD video now which is awesome for concerts and it meets all your other needs except price. I also would recommend the Panasonic DMC-TS2 because it is a rugged camera that is small and takes HD video also with a good low light sensor (the catch being that camera doesn't have motion still or the ability to shoot super clear with low light.

The pics attached are from a concert taken with a Panasonic TS1. The older version of the TS2 attached.

You might have to re-ask your question with more details. What kind of card is your 8GB San Disk? (thats the brand not type)

If it is SD it should fit no problem, if it is memory stick pro duo you will need a memory stick to SD adapter, which usually you have to buy a new memory card to get. It is possible the card you bought didnt come with an adapter because a lot of people are able to plug them into their computers. So, when you go to pick out another, just pick the cheapest card that includes the adapter.

Bestbuy.com sells the adapter, but I have never seen on in store. Ill attach it to this response.