Banners should be around 450x80 and reside on your server... a bit bigger or smaller than that size is fine. No flash banners or annoying, flashing-lights hit-the-monkey deals. You can also put a short sentence about your site below the banner ("so-and-so specializes in great hosting", "insert some company phrase", etc.)
$50 through PayPal for one month (30 days). That'll give you a total of 150,000+ unique views to your banner or link.
I don't do rotating ads, only one ad for their paid time in the order I receive them... so your ad will be the only one on the page, never rotated out, and placed above the content on the frontpage, centered.... where the Independent Outlook banner currently is.
The last time I offered advertising was back in May of 2004 on this very board (search for my name if you like). Josh at Independent Outlook took me up on the offer, and while I have no stats as to how many hits I sent him, he continued to purchase ad time every month from then until now... I'm going to guess that since he continued purchasing ad time for almost a year, something good was going on there. I'm not going to discuss why he decided to stop advertising here, but it has nothing to do with traffic or anything like that. If you'd like to contact him, he has given me permission to hook you up with him... his email is josh (at) independentoutlook (dot) com.
The Independent Outlook banner is set to expire on the 27th of this month, so whomever gets the slot will have their banner added to the site on that day.
Email: webmaster (at) musicmademe (dot) com
ICQ: 16307319 (won't be online until tomorrow)
AIM: LorillardOwnsMe (won't be online until tomorrow)
...or just reply / PM here.
As of this typing, there is nobody waiting to have their banner up; so it's first come, first served. I'll be offline until around this time tomorrow, so I'll get back with those who respond in the order that they replied.