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Getting listed in DMOZ is difficult. You have to ensure that you have a high quality site with all errors atteneded to and the site fully functional before you submit.

Generally you only get one decent shot at getting listed.

The time for inclusion into the directory can be quite long.

First, check that your category has a moderator.

Second, try and chose a more specific or locally targeted category that has a different moderator to the category you submitted to.

Thirdly, you could become a moderator of an un-moderated category that is relevant to your field.

A fourth option is to try and contact the moderator (some times they can be located) and ask for a reconsideration. I would cite some new and useful information and your comittment to producing a quality site within your niche.

You need to ensure a top quality site and an ethical and honest approach towards the moderator of the category.

This is along similar lines to the bio's but for companies that have industry body membership or sponsorship. Many industry bodies allow you to post news and have detailed descriptions where you get a lot of control. These sites are usually authorities on your subject too. I have used these to good effect.

I would recommend using a 301 redirect to the home page as this will pass link juice. If they can be redirected to the specific product category that would be useful.

An alternative would be to still serve up the old page so it results in a 200 code or a 301 to a product suggestion page. Having a products like this suggestion page and or a search for products page would likely convert better than just a blanket 301 redirect to the home page.

Another thing you could do is create an intelligent "catch" page that uses the search parameter (if there is one) or the title of the page referring the site and use that as a parameter for searching your products database and serving up some relevant products.