JAN
well if u r in Shanghai, the Bund (west side of the Huangpu River) is a must-see. Romantic at night. Day time could be crowded as it just re-opened after extensive works.
There are also upscale restaurants that you can try in the Bund vicinity, such as M on the Bund (u can also try Glamour Bar while u r there), Jean Georges, Mr. & Mrs. Bund etc.
If you have children, there is an outlet-like underground mall for children's apparel and shoes at cheap prices. It is called Neon Plaza (Nihong Guang Chang).
If you are looking to buy designer stuff, give it a miss cos imported stuff are very expensive here. The only things I would buy are bags that are out of stock elsewhere or if there is a sale (change season).
Some people like to tailor make clothes in Shanghai. Best to bring along a sample if u plan to do that. I think it can be ready in a day or two.
If u r very adventurous and love cheap clothing, there is a market at Qipu Lu (Qipu Rd) that sells v cheap casual clothes.
30 Apr has just been designated a public holiday due to the Expo so expect crowds wherever u go! Beware of pickpockets when u r at Nanjing Rd! There is Nanjing West Rd and Nanjing East Rd. West is where the high-end malls are at (plaza 66 notably). East is a pedestrian street which leads to the Bund. Nothing to buy at NJ East Street unless u want to buy some local food stuff (Shanghai First Food Store being the landmark there).
This could be a good source for restaurant/bar listings.
http://www.cityweekend.com.cn/shanghai