most (not all, some contributions are QTVR-only due to historical reasons)
many, but depends on photographer's choice of file upload (newer event = more likely to work) and your device's capabilities. You may experience slow playback, distorted images or unexpected browser quitting if there is only limited memory/GPU power available.
As Vancouver prepares for the Olympics the growing pains are starting to hurt. Construction of the Canada line was supposed to be a bored tube. Somehow the politicians changed tune and went with the low bid on the construction using a cut and cover technique. The small businesses are leaving and the unique character of the neighborhood is gone.