Hey Ari, I am in Shanghai at least once a month and normallr for one or two weeks. Next trip is in week of 21st Feb....would love to meet. let me know if you are up for it. Send me a PM.
For the photographic store, try the photographic centre on Luban Lu (don't have address on hand)..it's a treasure trove of analog equipment too...too bad the Renmimbi is so strong right now.
For living trips...well I lived there 4 years, and the place changes quickly, buut for sure you will find everyting you need there. For photographic tips, well it's an easy place to photograph and like all rapidly changing metropolis's there are endless subjects.