Feel Bored of LaTex Beamer Themes?

As it's known, Beamer is a very nicely-designed LaTex document class assisting presentations. There are a number of predefined Beamer themes available after Beamer is successfully installed in your machine. For Mac users who are using TeXShop, all beamer theme packages are stored under the following directory:

/usr/local/texlive/2009/texmf-dist/tex/latex/beamer/themes/theme/

Look at Beamer Theme Gallery for a structured index of all default themes.

However, we are never easy to be satisfied. The more you use Beamer, the more you would like to explore new features, or new templates. Do you ever feel bored of the predefined LaTex Beamer themes (usually mixed with the unnatural blue color)? 

Of course, if you are an expert on LaTex and Beamer, you can design really fancy template of your own. But most users are just "pure users" (including myself), it means we regard that to develop new packages or new templates is the job of real geeks. We just want to use the already existing stuff or do some really tiny modifications.

Here are two different Beamer templates (the black-white color, which gives you a more "pro" look) one could borrow:

1. Keynote style Beamer template
2. Manhattan Beamer theme

One can update the above templates with his own preferences, such as adding the page numbers, deleting the frame split, etc. Notice that the beamer theme files are also ".sty" files. To use them is nothing different from installing/adding other packages. Which means, either copy the ".sty" file under the same directory as the ".tex" file; or put it under 

/Users/your_name/Library/texmf/tex/latex

A small remark on the name of the theme file: all theme files seem to start with the prefix "beamertheme", for example, "beamerthemeFrankfurt.sty", or "beamerthemeManhattan.sty". This format should be strictly satisfied to ensure the successful importing of a corresponding template.