Today's Inc. 500 honoree, Arena Communications, makes a business of helping Republican congressional candidates by producing political direct mail in support of their campaigns.

Location: Salt Lake City
Three-Year Growth: 799.8%
2004 Revenue: $12.8 million
Employees: 8
Founded: 1996
What it does: Produces "high quality junk mail," in the words of CEO Peter Valcarce, for Republican congressional candidates primarily in the midwestern and western states. Why it's growing: Those candidates have won 70% of their races. Revenues are always down in odd-number years, but 30% of Arena's business is in "franking," sending out official taxpayer-funded mailings.

Inc.com is counting down to the unveiling of Inc. magazine's Inc. 500 list with a profile a day of one of this year's honorees. See other honorees in the Inc. 500 Countdown archive, and discover new winners each business day until Oct. 19, when we reveal this year's number one company.