2 GB is a ton of memory for Apps. You also have the rest of the 16 GB as internal memory. You can get yourself a micro SD card of 8 to 16 GB and set your camera, videos and music to be stored there. You can also download an app from the market call app2SD which will help you know which apps you can move from your phone memory to the SD card.
You can go to the app called task manager and the last tab called storage will show you exactly how much each of these partitions are using and their capacity.
It really does have a ton of memory!