Blogging Outside of Your Community By Not Blogging in Your Native Tongue — A person writing in a language that is not their own, especially when those words are published for all to read, may bear a responsibility to their readers to disclose that the language in the blog is not their native language, thus, giving readers a chance to forgive them before they correct them. — Read More… | Digg Story

I do agree with the author, that blogging outside your community has an impact on the number of people following you inside the community. For philsblogging.com, it has had a postive effect, too — at least on my blog, there are about 50% international visitors.