Sounds like it's up and ready for business, unless your running atalkd killed the one that is already running.
If you go to the Chooser on a mac and select file server it should at least list "quad".
Does "netstat -a" list the appletalk sockets?
Eg on my NetBSD box I get
Code:
Active ATALK connections (including servers)
Proto Recv-Q Send-Q Local Address Foreign Address (state)
ddp 0 0 65280.94.128 *.*.*
ddp 0 0 65280.94.72 *.*.*
ddp 0 0 65280.94.1 *.*.*
ddp 0 0 65280.94.2 *.*.*
ddp 0 0 65280.94.4 *.*.*
ddp 0 0 65280.94.6 *.*.*
ddp 0 0 *.*.1 *.*.*
ddp 0 0 *.*.2 *.*.*
ddp 0 0 *.*.4 *.*.*
ddp 0 0 *.*.6 *.*.*