I've written about Marita's Sweet Potato Pie Co. before, and I'm not sure I have much more to say about it, except that we stopped by the other day for a small Red Velvet Cake loaf ($10) to take as dessert to Desiree's house, and it was very well received. The cake itself, once again, wasn't anything special. Indeed, I don't think it's a chocolate cake died red, but a plain cake died red, but the cream cheese topping was wonderful.
In addition Marita now has a website, http://www.maritasbakery.com/, where you can check out their offerings. Their website is only half-developed, though, and they clearly based it on standard format. This makes for some funny reading, for example in their mission statement you can read how they'll strive to give you financing for your purchase and how the owner, John Doe, is a member of a number of Metropolis organizations.
And they do deliver, though they have a $25 minimun order and they charge a $10 delivery fee for all orders under $100. So far they only deliver throughout the East Bay, though they hope to expand (so all of you in San Francisco who are hungering for Red Velvet Cake, may get it soon).
Anyway, it's a locally own (AFAIK) and small business, and I like that it's there.