There's no need to wait for Apple to release an updated version of iSync for your Nokia E61i. Navigate to Applications » iSync » (Control-click and choose Show Package Contents) » Contents » Plugins » ApplePhoneConduit.syncdevice » Contents » Plugins » PhoneModelsSync.phoneplugin » Contents » Resources.
Locate Metaclasses.plist in this folder, open it in your favorite editor, and add this section of code:
<key>com.nokia.E61i-2</key>
<dict>
<key>Identification</key>
<dict>
<key>com.apple.cgmi+cgmm</key>
<string>Nokia+Nokia E61i-2</string>
<key>com.apple.gmi+gmm</key>
<string>Nokia+Nokia E61i-2</string>
</dict>
<key>InheritsFrom</key>
<array>
<string>family.com.nokia.serie60v2.3</string>
</array>
<key>Services</key>
<array>
<dict>
<key>ServiceName</key>
<string>com.apple.model</string>
<key>ServiceProperties</key>
<dict>
<key>ModelIcon</key>
<string>NOKE61i.tiff</string>
<key>ModelName</key>
<string>E61i</string>
</dict>
</dict>
</array>
</dict>
You'll need to create a new icon and name it NOKE61i.tiff.
Mac OS X Hints
http://hints.macworld.com/article.php?story=20070219135621170