PHP Code:
adslspeed.com 
I bought this domain almost 1 yr ago and already got my money back in 2 months!!!!
At first i ve build a website providing a service related to the keywords and when traffic jumped on 500 uniques per day i put up adsense and got some nice cash back.

Some months ago i decided to invest the money i got and started developing my own speed test service(i was using someone else client so i lost some traffic from exit link clicks), it took me some time to get there but it was worth it.(now getting more traffic and better ctr rates and reduced bounc rates)
Website is currently using Joomla(instead of simple css and html) and has a flash application for doing the speedtest.

My speed test service has the good old speed test for download and upload and also has a ping meter along with some stats about the time visitor needs to download a movie. When speed test is done visitors can hit the embed option on top right that will provide them with some code for pasting their results in image format, we provide two embed codes, one for forums and one for blogs, websites. Visitor can also save the image locally so he can keep an archive

I also developed my own widget so that selected websites(at first) can use it for their own and host it inside their servers so they wont loose any traffic by providing only links to a speed test.
I m starting picking websites that want to co-operate with me and send them the widget and installation details, i feel that users of DNF can really use this widget and i ll be more than glad to offer them.

So to make it short, if you plz post reviews or ideas about my website(it has some flaws for differemt screen resolutions since scroll bars appear) and if you want pm me for using the widget so i can provide you the zip file with source and how to use guide.