Google Mobile Search
I was playing with Google Mobile Search today (it's really cool!) which allows you to only get XHTML results from a search on your mobile phone.
this essentially means they've flagged XHTML sites into a separate searchable index.
what struck me about this, is that it must be somewhat easy for Google to create sub-indexes of their index so that results only come from a sub-index.
this means it would be equally as easy for them to create a "blog" search or RSS feed search. Now I think they need to make that a real time set of results, but it has to be coming soon.
With the new Technorati getting slower and slower and being clouded by "Tags" which are totally useless, I imagine I will be saying goodbye to Technorati very soon. Right now it's a habit that i use Technorati every day, but man, I would expect to drop them like a steaming hot iron if i had a real time Google. (or Yahoo!)