Invesco Field? Huh? Where? Oh, You Mean Mile High Stadium

I don't know what the company named Invesco does -- my gut and English grammar classes tell me that it's probably ''invest.''

But it ''invested'' six million dollars to get the naming rights to the place where the Denver Broncos play football.

Many companies have taken to giving themselves safely opaque names made up of significant-sounding syllables [Altria makes cigarettes, but you'd never know it from its name]. Firms with names like Alltel, Conseco and Corel have paid millions for naming rights to sports venues.

Invesco probably expected a huge PR bounce out of Barack Obama's stadium speech to the Democratic convention; ''Invesco'' would be on everyone's lips -- famous lips, too, from renowned politicians to talking heads.

So what happens in Denver? Multiple millions of people will watch Thursday night as Barack Obama delivers his acceptance speech in what fans and journalists alike still insist on calling Mile High Stadium.

And when Invesco's deal expires in 2021, it won't matter which Sucker Inc. steps up with the next load of naming bucks; people will still call it Mile High Stadium. Alltel, Comerica, Arco -- don't say you haven't been warned.

The photo of Mile Hi -- er, Invesco Field is by Doug Pensinger/Getty Images.