Why is there a large pool of visitors visiting my site from Google using an unknown searchword or phrase. At least that is what I understand from this report. Check your: Inbound Referrals -> Google -> Unknown. '

No visitors can reach my site without searching for it!?!?!

I don't excactly know how they reach your site, it may be because they use feeds in their iGoogle page...

Yes. It's strange that htey have this category. Shuldn't everything be tracked from google.

Couldn't those people be coming from feeds hosed by google? Then you don't need a search phrase to get an inbound referral!

That could indeed be the case. I gues a lot of feeds are run by google. I checked my woopra, which nicely shows the visitors from feeds (amonst other segmentation like, communities, social networks... etc.) and a lot of people come from feeds and thus do not use a serarch temr to find your site.

MS may want to make this clear and maybe could differentiate between search referals from google and those visitors entering your site from feed readers.

Yes they are usually feed readers that people have on their Google dashboard.