Spencer Finnell

You could customize the Author Template to include listings by that author, as well as other information.

You’d probably get better support from the site you bought the themes (assuming you’re talking about the ePanel from elegant themes.)

You can put it anywhere. It doesn’t matter.

Does it actually redirect back to index.php, (in the address bar) or is it just not showing the next page of posts?

Are any posts showing up? Are there old posts that still display?

Read Moving WordPress Within Your Site

Yes. You need to regenerate your thumbnails. Try this plugin.

Can you post a URL to your site?

Your thumbnails should be the same size you have set, or larger. If you have a smaller image, it will be stretched to fit the minimum dimensions you entered.

If you are using wp_list_pages, you can change it to wp_list_pages( 'depth=1' ); If not, how are you listing your pages?

You can use CSS3 to create rounded tabs. However, they will only be rounded in browsers that support CSS3. Read more about CSS3 border-radius here.

Does your theme have .alignleft and .alignright classes in the stylesheet? WordPress automatically adds those classes depending on which way you set them to align. However, if those classes don’t exist, the proper CSS won’t be added to the images.

If that class is not defined in the stylesheet of of your theme, simply define it yourself and add the styles you need to it.

.wp-post-image {
// stuff
}

I’m not sure, because I’m not familiar with that plugin. You can look for a different sitemap plugin, or create the map yourself, using functions like wp_list_categories, wp_list_pages, etc.

You should check out wp_nav_menu which lets you integrate the new menu management in WordPress 3.0. This will allow you to create a mixture of pages/categories in your navigation, saving the trouble of having to create custom pages.