Bitty Browser Home Page: I don’t know what I’d use it for, but this is cute.
Bitty is the little browser that goes on any Web page, it’s like Picture-in-Picture for the Web.
Via Jon Udell who comes to the same conclusion I did:
Scanning the commentary at that link shows that there’s interest in this kind of picture-in-picture capability, along with some confusion about whether it’s useful, and if so how. I’m ambivalent too […]
If you used script to affect the outer page from things that happened on the inner page, then it could be a nice little subnavigation or “finder” tool for a larger app. You still have the perenial problem of breaking the back button, but since there’s embedded navigation, maybe that’s not so bad.
But should this be concerning:

I haven’t examined in detail how Bitty works, but can’t you do this with an IFRAME?
In any content management (or information management) system of sufficient complexity, you will have to interlink records. You will always get to the point where, in the process of editing a record, you will have to specify another record. (Let me note here that the title to this entry is…