85w ago - Previously Sony confirmed that PSN users can activate downloaded games on to up to five different PS3 or PSP systems, but today PlayStation Network Operations VP Gordon Thornton has announced this policy is being changed to only two- possibly to curb game sharing.
One alternative for those on PS3 Custom Firmware is to check out the PlayStation 3 homebrew exdata license reactivation tool ReActPSN which currently reactivates PlayStation Network data.
To quote: We'd like to inform you of some upcoming changes to the usage policies for PlayStation Network game content.
As of November 18, 2011, the number of devices that can be activated on one PlayStation Network account for game content purchased from the PlayStation Store will be updated.
For game content purchased after November 18, 2011, a new policy will apply and the number of devices that can be activated will be as follows:
186w ago - Update: According to TheSixthAxis.com, SCEE's Community Team Leader MusterBusterconfirmed this is a typo, to quote: "This is a typo - the number of activated consoles is STILL 5. You should receive an updated email within the next few days."
Several months ago Sony sent out a warning to those involved in PSN game sharing, and recently the European PlayStation Network Terms of Service (linked above) has been updated to reflect this.
Although the US Terms of Service still state that "You can download the title to up to 5 different PLAYSTATION 3 systems" the EU counterpart now states only three, to quote: