Using MSN/Windows Live Messenger inside a Google Talk session is how I currently connect to the service from my BlackBerry. Following this guide, you can easily have contact transparency.

Recently the transport I was using went down. bgmn.net was a very reliable service in my experience, but it requires a local @bgmn.net identity – which isn’t compatible with Google Talk.

As a replacement, I’ve just registered with the jaim.at transport – following the guide instructions but using jaim.at as the server, you should be up and running in very little time.

I’ve found the following caveats:

• If a Yahoo Messenger contact has added your MSN account to their contact list, some MSN transports can’t deal with the status message and will effectively brick your account from being used.
• Removing a transport involves reauthorizing your contacts again. Make sure you’ve got some time to take care of this.