All though these products are built on top of the same technology as Microsoft Office SharePoint Server 2007, it does not require an install of WSS or MOSS. The new products bring new features to the table that really make this product a must have for many businesses.
If you are familiar with search inside MOSS, then you should feel right at home with the user interface that is offered in Search Server. One of the best new features is the ability to add federated search to your environment.
So what exactly does that mean? The index engine inside MOSS can crawl any type of content. But what if you already have other search engines inside your infrastructure that already has this content index? Search Server is capable of communicating with other types of search engines and indexes. Search Server is able to do this with new concept of Federated Search Connectors.
Microsoft has made a couple of sample connectors available for download. You can check them out at http://www.microsoft.com/enterprisesearch/connectors/federated.aspx. We will discuss federated search in more detail in the near future.
Check out some of the product features that are available. See the full list from Microsoft @ http://www.microsoft.com/enterprisesearch/products.aspx#compare

All though there is no limit of the documents you can search and index with Search Server 2008 Express, there is a limit if you are using it with SQL Server Express Edition. The maximum size of a SQL Server Express Edition database is 4 GB. This in turn restricts Search Server 2008 to about 400,000 documents, depending on the size and type of your documents.
As with all of the Express products, Search Server 2008 Express is available for free. In my next posting we will look at adding Search Server 2008 Express on top of WSS 3.0.
You can learn more and download the Express product at http://www.microsoft.com/enterprisesearch.

