DrupalThemesOnly

Located under admin, site maintenance, performance or /admin/settings/performance at the bottom of the screen there is a button labeled "Clear cached data" - It could also be labeled "show new block theme" as block themes are cached data by default.

My understanding the easiest way to find the name for the block would be to at the configuration url for the block. IE recent blog posts ... 127.0.0.1/drupal/admin/build/block/configure/blog/0

that gives me the name for the file in the theme directory of block-blog-0.tpl.php (all block templates start with block- and slashes change to dashes; underlines if any remain underlines, yes it makes the file name look funny but changing file names are not part of the design).

If that file does not exist in the theme drupal then looks for block-blog.tpl.php and

If that file does not exist, it looks for block.tpl.php ...

If that does not exist it uses its core file drupal\modules\system\block.tpl.php ... do not change the core files but you can copy it as a starting point.

block-blog-0.tpl.php effects only the single blocks
block-blog.tpl.php would be used for all blog blocks ... blog-1, blog-2 ... assuming block-blog-0.tpl.php, block-blog-1.tpl.php, etc do not exist.
block.tpl.php would be used for all blocks assuming there is not a different block to be used which was already located.

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Nice site, I'm looking for some companies that may want to host themes for the benefit of their clients. If nobody is interested I am glad that I can share them here.

http://wsmithdesign.wordpress.com/