WordPress MU

Is it possible to get a post by it's ID and the blog ID without having to switch blogs? I wish there was a function like query_posts() that could accept a blog id and only return posts within that blog.

Sort of on a related note about performance, what are the performance impact on using switch_to_blog() in a loop that could potentially iterate hundreds of times?

Thanks.

Sort of on a related note about performance, what are the performance impact on using switch_to_blog() in a loop that could potentially iterate hundreds of times?

Huge. That function is expensive.

If you're just pulling posts from one particular blog, gimmie a use-case.