Suppose you have two computers, each with its own iPhoto library. Picasa does not unify all the photos into one repository and allow you to use them (for edits

Suppose you have two computers, each with its own iPhoto library. Picasa does not unify all the photos into one repository and allow you to use them (for edits, or for composition into specialized collections of photos for sharing). Also, it does not solve the problem of the iPhoto library filling up most of the hard drive and the user still wanting to seamlessly use the photos as described above.