One of the more promising new developments for companies with extensive Web offerings are custom toolbars, now relatively easy to build with Internet Explorer 5+ extensions. Several top Internet companies have already deployed toolbars including Google, eBay, Yahoo, and Ask Jeeves. Many more are in the planning stages. Also, numerous companies have deployed the toolbars internally to better navigate company intranets.

Our first practical experience with a custom toolbar began last year when we downloaded Google’s version (above). Since then we’ve used it thousands of times and have found it to be a great time saver. Instead of going to its Web site, you simply enter your search term directly into the Google search box embedded in the browser. The toolbar also has a number of other features that we rarely use, such as page rank and site info. It’s currently available in 15 languages, with more in the works.

Ebay is the newest entrant, officially launching its toolbar a month ago following a six-month beta. It was officially launched July 11, but it’s still not widely promoted on the site http://pages.ebay.com/ebay_toolbar . Ebay spokesperson Kevin Purseglove declined to provide usage figures but told us that initial feedback was very positive and the company was thinking about promotional ideas to get the word out. With 43 million users, eBay is rolling out the service slowly so as not to overwhelm its resources.

Like Google, the key feature is the embedded search box. But for power users, that’s just the beginning; you can elect to receive popup alerts whenever a flagged auction is about to end. Users needn’t even be online to receive alerts, they are triggered by the auction end-time. Assuming its acquisition goes through, it shouldn’t be long before PayPal is incorporated into eBay’s toolbar.

The eBay toolbar is the result of a yearlong project by @Hoc  (pronounced at hoc), the Burlingame, CA-based company that has also built toolbars for Wired Magazine, Dreyfus Brokerage, HSBC’s Bourse, Multex Investors and a couple dozen others.

Privately held @Hoc  www.athoc.com  was founded in mid-1999. At that time a number of other companies were building proprietary toolbars they hoped would attract end users and ultimately advertisers to pay the freight. By the time @Hoc launched its product in mid-2001, those efforts had gone by the wayside, victims of the Internet advertising downturn. @Hoc has survived by focusing on private-branded toolbars for company intranets.

Initially the company targeted financial services, experiencing an early win with Dreyfus Brokerage Services. But the Dreyfus toolbar is gone, a casualty of its acquisition by Brown & Company. Other promising discussions with banks such as Wells Fargo, Bank of America, and Bank One were scuttled post-911.

@Hoc believes the best opportunities in banking are on the commercial and small business side. Co-founder Ly Tran sees little need for a consumer-oriented banking toolbar. While we agree the B2B application makes sense, we think a consumer toolbar is just as useful, especially if combined with popular search applications such as Google .

One limitation of customer toolbars and buttons is that most users do not want to hassle with changing browser settings. And for those that attempt to make changes, your tech support lines may be overloaded with questions from novice users. A less labor-intensive, but more expensive, approach to keep your name on the desktop is to ride on the coattails of the Web’s sixth most popular site, WeatherBug. This turnkey program requires little user involvement, reducing confusion and tech