For some reason I've found myself using the following tools fairly regularly:

• Online Font Converter - very quickly convert from OTF to TTF (and many other formats). Why would you need to do this? Well, if you've ever encountered this bug in Flash CS5, you'll know why.
• Font 2 Web - super easy conversion tool for setting up your @font-face undertakings. Similar to the Font Squirrel generator but, amazingly, with even fewer options. No fuss, no muss.