First of all, welcome to the forum. :)

1. Yes. You can edit the css file that comes with any skin and change colors, fonts, images, anything.

2. Yes, you can delete the blogs you don't want. Use blog number 2 (Blog A) as your blog, since #1 is a special aggregator blog. Then delete the others.

3. Yes. When you're posting, select the checkbox labeled "edit timestamp" and put in whatever date and time you want.

I hope this helps, let us know if you need clarification on any of those points.

Okay, I am not good with CSS, but hopefully b2evo has easy options that would allow for these changes.

One more question: Is a given blog post allowed to be categorized in more than one category?

If you learn some css, I think you'll find it well worth your time. Here are some tutorials:

http://www.w3schools.com/css/

Yes, you can put one post in several categories.

Thanks a lot. This will help me figure out how to change background color and font fact, which is the only two beefs I have with the "Nifty Corners" skin. Other than that, how does one edit a CSS style sheet? Notepad?

Yes, Notepad works fine. If you want some syntax highlighting, which can be a big help, try a more advanced text editor, like [url=http://notepad-plus.sourceforge.net/]Notepad++[/url]. There are programs just for editing CSS, too, but I've never found them very useful.

Another stupid question: In my non-formal blog, I do most of the posting, but others sometimes e-mail me something that I post and then attribute it to them. I'm sure b2evo will allow you to post the name of the author?

The name of the author comes from the username of the person who posts, so it would be your name. One option would be to create user accounts for the people who you want to post. Give them permission to post with Draft status and nothing else. They won't be able to edit the blog or publish posts. You can review their post and click Publish Now! and it will go live, with their username as the author.

Another option would be to just add "submitted by so-and-so" at the bottom of the post body.