I use Microsoft Messenger 8 (Microsoft's official MSN client.) I don't like Adium myself, since it has an absolutely horrible interface.
There are a huge amount of skins for Adium and you can tweak just about every aspect of it. I'm pretty sure you could make it look exactly like messenger.
I use Microsoft Messenger 8 (Microsoft's official MSN client.) I don't like Adium myself, since it has an absolutely horrible interface.
Adium does seem to have a lot of support on these forums, though.
I've used Adium but prefer iChat because of it's AV features. Other than that they are comparable and it just comes down to personal preference.
The real question is, why would you want to?