Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
I don't recall the ability to sync individually selected songs, but syncing selected playlists is still there, as always.

Not that I remember everything (or much of anything anymore, for that matter), but are you sure that individual songs could be selected? 😱
 
Create an iPhone Playlist, and select that playlist to sync with your iPhone.

Do the same for iPhoto.
 
iPhone Summary Screen

on the iPhone 'Summary' screen, at the very bottom is a check box for 'Only sync checked items' -- is that what you're looking for?
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.