Re:Lacking (Score 1)

I'm biased based on my experiences with these tools. I love them.

I assume Yahoo searches those headers. I just validated that X1 search finds the host.domain in the to header on my system.

Though I haven't actually used the Yahoo search tool, Yahoo recently did an agreement with X1 and I'm a user of X1 Search (http://www.x1.com). The user interface looks very similar. I'm guessing the underlying engine and application is the same. As far as I'm concerned, X1 search stomps all over Google desktop search.

I removed Google desktop search after driving X1 search for several weeks.

I've only got about 400,000 files including email/attachments indexed because I don't do my entire machine. I use the many additional file types, the more thorough settings/customization and the far better search user interface (I.e. condense more information on one page, search in document contents, then allow filter/search in any of the columns among the hits like path, extension, from, to, cc, bcc, etc).

The problem I see is that the Google brand plus the fact that many people just don't need as much search function to be productive.

Tools like this can really change the way you work. You find ways to optimize your taking and keyword generation in files all over the place on your hard drive. Recovering information becomes trivial. Unfortunately, you also tend to stop studying a little earlier than you normally would. It can be sort of a bad trend as you actually "offload" some of your memory to the machine.