Replication not working?

[Jesse]

I'm playing with setting up replication on two MySQL Servers that I have set 
up here.  I set it up according to the instructions found on the MySQL web 
site, then I went in on the master and added a new record to one of the 
tables, then checked the slave about 30 minutes later, and the record has 
not appeared.  How often does the slave check for new records on the master? 
Also, is there some location that I can check for errors?

Thanks,
Jesse