The Pro/INTRALINK 3.3, SP 2 (M021) was released to support Pro/ENGINEER Wildfire 2.0 Production release which is supposed to come out a week from Monday (I'll believe it when I see it).
However, to keep up with the Jones, Pro/INTRALINK is being migrated to Oracle 9i to match the Windchill Oracle version. Database changes require point releases. Thus version 3.4 is coming in the June time frame.
You can look at the tenative product release dates through the PDS Calendar if you have a PTC Customer login.