I have a Nokia 6234, a model that unfortunately is not supported by iSync on the Mac out of the box. I have been looking for a solution more or less since I got the phone and today I found it on .mactomster. They offer an iSync plugin for a large variety of Nokia mobile phones. The site is all in German so it took me a few minutes to work out that I had to register before I could download the plugin but I eventually got there. Luckily the installation instructions also come in English but they are so simple it would be difficult to get it wrong. Once I had downloaded the plugin, it took the whole of 5 minutes to have it installed and my data sync'ed. What more could I ask for? This is what software should be like!
So, if your Nokia phone is one of the unsupported models on the Mac, get this plugin and you'll be sync'ing in minutes. Then make sure you click the Paypal button as those guys definitely deserve your support.