Geocoding 5000 addresses in php script

[mertoxin]

I'm looking to geocode over 5000 addresses at once in a PHP script (this will only ever be run once).I have been looking into google as a potential resource for doing just this, however I've read reports that after running 200 or so queries through them google will kick you off for the day.I was just wondering if there was any other way to geocode 5000 or so addresses, another service like google offers or something similar I could use?Or will I just have to stagger this? The problem is I don't really have much time and to do 200 or 300 a day for 5000 results will take almost 5 (working) weeks.ThanksTom