11.   For Microsoft, it could create an instant new market for everything from online ads to new software and services.

12.   In fact, i-traffic, a New York firm that buys online ads for clients such as Disney, Hearst and BellSouth, pioneered the practice.

13.   In recent months, as online ad spending has tailed off, many sites have been experimenting with creative, intrusive, sometimes downright obnoxious forms of advertising.

14.   In February, the bureau released standards for sizes and shapes for online ads.

15.   Internet legal experts said the unusual cases could profoundly affect the rules of online ads.

16.   Its assets such as corporate goodwill, and revenues such as online ads, can present auditors with a challenge.

17.   LaChance says she also hopes to sell display ads online which will push local advertisers to the top of the listings heap.

18.   Like any new medium, online ads are also subject to technical potholes.

19.   Of course, DoubleClick is not alone in its ambition to use offline data to make its online ads more effective.

20.   Offline partnerships are a growing area for the other big player in online personal ads, Matchmaker.com.