I read a very interesting article about Buddhism in China on http://www.chinaorbit.com. I planning my journey to Tibet at the moment but before that I would like to see some Buddhistic temples in Beijing.
Lama temple is the only place like that I know. Do you know some more?

theres actually a lot of temples in Beijing other than the beautiful lama temple. Definitely check out the Temple of Heaven, its below the forbidden city. I'd suggest to get the all inclusive ticket because other you have to keep buying the tickets once inside, which i think is more expensive compared to the all inclusive ticket. I haven't been to any others but there are a lot more. Check out the link below, this site lists most of them and tells how much they are and how to get there.

http://www.china.org.cn/english/feature ... /30554.htm

Hope it helps!