we're setting up a company blog. Our technology stack is .NET. Should we just use blogger/wordpress for the blog and redirect to it from our site? or should i install a blog engine directly on our site (e.g. blogEngine.NET)?

some considerations i'd like feedback on are:

1.SEO - if you host your blog on wordpress/blogger instead of installing it on your site - will you get better page rankings? (if the content was the exact same)

2.scalability - i've read that dotNetBlogEngine doesnt scale well on web farms etc. our website is setup to be stateless.

3.security - presumably a hosted blog site has the advantage of having regular security updates. how easy is it to keep an installed blog engine patched?

4.examples of installed blog engines - dotNetBlogEngine seems to be the best but has a couple of limitations. can anyone suggest another one (n/a if you're advice is to host the blog on blogger/wordpress)

5.any other comments/issues/concerns we should be aware of?

thanks for your feedback!