Congrats on broadband! Won't take long to become spoiled. Using someone elses PC on a dial-up connection has me pulling out my hair in impatience.
Speed check? How long since you've just browsed at deviantArt? That place is phenomenal once you don't have to wait 10 minutes for each page of thumbnails.
But I know what you mean. Here's a couple:
http://reviews.cnet.com/Bandwidth_meter/7004-7254_7-0.html (CNet)
http://nyc.speakeasy.net/ (Speakeasy)
Google will get you plenty, but they don't all work the same. I like the Speakeasy one here because it's the only one that really kicks my upload speed near max, allowing me to calibrate meters....I digress.
Have fun.
rabidrobot