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HealthMash is a new knowledge base that bills its mission as promoting health and well-being by providing relevant information of high quality from trusted health sources on the Web, using sophisticated Web 2.0 universal search and discovery technology with Semantic Web Concepts.

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Clicking on the topic in the tree or graph brings the pages in that cluster to the top of the results list and is a useful way of focusing your search...

- Tales from the Terminal Room

You can choose which databases to search in and which to exclude from your list. It works with well-known medical databases and there is an open discussion about which new sources to use. Essentially it’s up to the users. Below is a list of the search engines you can choose from as well. Search Medgadget, Clinical Trials, Cancer.gov and many more.

- emrupdate.com

One of the projects he's been testing is Scienceroll Search, a personalized medical search engine powered by Polymeta.com. You can choose which databases to search in and which to exclude from your list. It works with well-known medical databases and there is an open discussion about which new sources to use. Essentially it's up to the users. Now you can search in the database through Medgadget posts as well.

- medgadget.com

The cluster tree shows topics - fairly descriptive rather than the one-word form used at several metasearchers. The graph is done through Java - will be slower to load but is worth the wait in order to fine tune the search. Web 2.0 interface is effective. Tool does show source search engine for result (MSN, Google etc). It doesn't provide any controls on choice of engine, number of results, or an "advanced" search form. But that's fine - it's still impressive. PolyMeta is a keeper.

- websearchguide.ca