You've given absolutely no information to answer this question. Everything you need to know to use the ADXL202 is in the datasheet, which you can get from the www.analog.com website. If you have any specific questions, feel free to ask, but give people enough background information to properly answer.
actually, you need to check which 202 you have. there are two different versions and the newer datasheet leaves off some info (like pinout) about the older one. you hve to root around the AD site to find it.
use the pulse width interface, it's easier.
go read the datasheet and then come back with questions that show you've thought about it. also tell us more about your application if you want quality answers.
Are you looking for ideas of what to do with an accelerometer (project ideas) OR how to use/interface/talk to one? I got the impression that you are looking for project ideas....