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ritualcoffee - 3:11 pm on May 7, 2003 (gmt 0)
I would suggest increasing the dollar amount in a step up fashion. Maybe every quarter re-evaluate the budgeting based on roi and re-balance funding. Keep an eye on the ppc tests - some are way better than others. Take into condsideration PPC feeds (ie overture feeding Yahoo)
The click thru rate on ppc is better than the other mediums that I have used. click per lead/cost per lead has been better than traditional banners, html emails, and newsletters.