You can still buy the ticket of any forthcoming IPL 2010 cricket match, the price range is Rs 1000 to Rs 5000. The ticket of price around Rs 5000 is included with hospitality service and the seat is located at the most front place of the pitch. (Price indicated here is indicative only, actual price may be different.)
You can do online ticket booking of IPL cricket 2010 at THIS LINK (for Mumbai Indians)
For Delhi Daredevils or Kings XI Punjab click THIS LINK
On clicking the link, you can have option to choose the block of stadium and also you can choose the seat of your choice that is available.
IPL 2010 will end on 25th April 2010. Complete schedule is given here.