If you need to test if your boadband connection is really broadband then Cnet Bandwidth testing is a good tool to use.
It will ask you for a zip code, if you not in the US, just put any zip code and that should work.
My home connections shows a decent 25 KBps.
Actually, there is also one site where you can test your bandwidth. It’s http://2wire.com. It will automatically test your bandwidth without inputting any zipcodes or whatsoever. For me it does work and can really rely on it.