[ahalam]

The problem with FB groups is that both you and the friends that you want to share the link/photo/message with have to agree to be part of that group. I usually put my friends in multiple groups/circles, i.e. they could be a work colleague but also a eating out enthusiast. This multiple categorization can easily get messy and definitely doesn't scale to hundreds of friends.

Hopefully, with Google+ Circles my private categorization of my friends is not shared with them. They should only see what I share.

[barista]

It's actually called list. Groups in FB is something different. Try creating a friend list and then you can share it with only that list.

[sandipagr]

You can't share with lists alone. Facebook sharing options are friends, friends and networks, Friends and their friends and so on. Or you have to add each friend individually. It's just weird how lists are pretty much useless in facebook.

[0x0]

Sure you can. In the status update thing, click the padlock and choose "Customize" and then "Specific people", and you can enter lists of friendlists.

(Granted, it's not very discoverable)

[smackfu]

Yep, my default sharing option is "Friends Only; Except: Work"

Only bummer is that you can't do fancy options like that with the Facebook iPhone app. You can only do your default, the normal options like Friends Only, or specific groups.