Asian weddings have different events depending on religion and background. Muslim an Sikh weddings are pretty similar, and Hindu weddings tend to be a little different. You'll find that there are a number of events that lead up to the big day, and then a post wedding reception is normal. I'm not too sure of Hindu weddings, but Sikh/ Muslim weddings usually consist of the following;
Girls Mehndi (Henna applied to the girl, lots of dancing)
Boys Mehndi (as above, but for the boy)
Wedding day - events can start off at home depending on the how the family does things, but usual end up at at the venue where the main ceremony takes places. Sikh weddings have A LOT of dancing, and muslim weddings tend to be a little more conservative.
Post wedding reception - Pretty much as the wedding day without the actual ceremony. The muslim name for this day is Walima. This day is usually hosted by the boys family, as the wedding day is hosted by the girls family.
With any asian wedding you'll find that there is a lot of colour. Pre wedding days are made up with orange, green, yellow. The wedding day is usually flourishing in red, though brides are now stepping out of the norm and going for other colours.
Although once, it was all about formal portraits, some of the younger generation are asking for a more artistic style of photography. There is heaps of emotion on all the events and with every laughter you'll find someone shedding a tear. Keep an eye on the immediate family of both sides as that will be the most important shots of the day. Try to get them out of the way first when posing shots and then worry about everyone else.
If you're looking for some inspiration (and you're on facebook) take a look at this guy
Asian Wedding Photographer. Although most of his images relate to Hindu weddings, you get an idea of what a little creativity can do.
Hope that helps. If you need to know any more.. drop me a PM or ask here.