Apart from that, you can also add 3rd party Ads from other Ad Networks. If the other Ad Networks provide their javascript, u can use directly the HTML/Javascript Gadget that is provided in the list of gadgets (instead of cutting-and-pasting the codes into the 'Edit HTML-Layout' section of the Blogs.)

Just paste your codes into the content section and if you don't want any ugly titles appearing above your ads, don't write/type anything in the title section. Leave it blank, or press the space key (so that the title is given a blank space).