ProFootballTalk ‏@ProFootballTalk 35m
NFL announces expansion of practice squads to 10 players http://wp.me/p14QSB-9xRl

Plus, there were some eligibility changes:

Quote Originally Posted by PFT
And it isn’t just players previously eligible for the practice squad either. The league also announced that each team will be able to sign two players “who have earned no more than two accrued seasons of free agency credit.” Otherwise players who have earned one or more accrued seasons would not be eligible for the practice squad unless they spent fewer than nine games on the 46-man gameday roster during those seasons.

One other change will allow players to hold onto practice squad eligibility longer. Players now need to have a minimum of six games on the practice squad, up from three, for the year to count as one of the three that they are eligible to be placed on the practice squad.