For reasons I don't totally understand, I struggled over this issue for a very long time. Now that I've made the decision to use a pseudonym, and to create an alter ego for my online marketing, I can't understand why the decision was so difficult.
Many novelists have used pseudonyms, for a variety of reasons, so it isn't like I'm doing something unusual. On the contrary, using a pseudonym seems to be very common. I guess it just feels strange to me to use a different name, even though I've been blogging under a "bloggish identity" for years.
In any case, having made the decision, I'm happy with it. Meredith may be a pen name, but my Inner Author is a real, honest-to-god part of who I always have been. I consider Meredith to be the writer in me. I'm kind of glad to give her a name and a semi-separate persona.