Yes, there are several IM clients:
Gaim (supports AIM, Yahoo!, MSN and others),
aMSN and
Kopete (I think this is a multi-protocol one also, but have never used it) amongst others.
I use Gaim personally and I like it. You can probably find these for your distro, I know nothing about OpenSuSe though, having never used it.
Above all, welcome to LQ and have fun with Linux

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