SIIM RAUD  Adding menu bar is difficult in Leopard. It's impossibe to add menu bar while application is running. The only way to do it is to close the application, change the application bundle and relaunch the application (Quicksilver is doing exactly that). But changing application bundle is big no-no, application should not change it. Well, I'm thinking about it, I would like it to have menu bar in window mode also.  
(Version 0.4)

ENCRO  Is it really that hard?

Looking at the screenshot, you can see a list of the host files of which only 1 can be active on the system (selected by using the tick button). By default there will usually only be a single default hosts file in /etc (called hosts). To add a new configuration click the plus button, to remove it click the remove button. The save button obviously saves changes to the hosts config. So basically the app allows you to rapidly swap between configurations on the fly.

If you don't know what a hosts file is try searching in your favourite search engine for 'unix hosts file'. It's pretty much a file that tells your computer which IP address is associated with what URL. You can use it to re-direct addresses and block advertisements at the system level. If you are interested in that then search for 'ad blocking hosts file' instead :)

The developer nor I should not have to hold your hand and spoon feed you information. If you want to learn, you can (and will).  
(Version 0.4)