Group Friends List
A few people have commented on the small number of friends INITIALLY available when adding a group.
The list of friends in the add group column grows as more of your friends become active, or to put it another way as TweetDeck becomes aware of who your friends are it adds then to the list.
I've done it like this since the twitter API only allows me to get 100 friends at a time so if you have thousands of friends TweetDeck would have to do some looping which could be quite slow but, more importantly, counts against your Twitter API calls. You only need to leave TweetDeck running overnight for the list to grow substantially.
I'm totally up for making this more immeadiate so if you have any ideas please let me know.
[UPDATE] I will be implementing a single call at runtime to get the most recently active 100 friends - which should give a better starting list for adding a group (for v0.15)
Now that I understand how it works it makes sense, it was just unclear. Keep up the good work.