So... How is your TCP/IP connection setup? Sounds like you may be using localtalk? Hmm... looks like it crashes just after doing a dns query perhaps? I was reading about bbraun's http disk block driver... and he said that dns occurs in the device driver which is bad so you may want to try hardcoding a server address just to avoid doing DNS. I don't have any mac I can develop on yet sadly.... working on it!

This looks like it has useful info http://www.umich.edu/~archive/mac/misc/documentation/mactcpinfo1.2.txt

Also I like XMacPP ;-) ... lol Better than MacinJabber which would sort of be a play on MacinTalk!