Company to sell or utilize banners ad space?

We are in the process of looking for a company to sell /utilize our remnant/available 728 x 90 LeaderBoards and 120 x 600 SkyScrapers that are unsold throughout our site.

Any suggestions on a reputable company? Obviously looking for the revenue share.

Thanks.

I would check out reputable Adbrite.com and Adengage.com both are companies that push your extra adspace and find buyers for them. Only downfall is that there are a lot of completely worthless sites on here trying to get advertising money, and people need to sift through quite many sites to find a good ad space, but thats my problem as an advertiser not a puiblisher But if you have a legitimate site with decent traffic and accurate and fair ad pricing, you should do just fine. Just post your site on theirs and in theory if the above formula is used you should sell adspace quite quickly.