You can get a 1 month EU PS+ code for free, which doesn't require a CC. The only catch is that it won't work if your EU account has had PS+ in the past, like the free month with the Welcome Back program in 2011. Just create a new EU account to get it to work.
If you don't use Chrome, the things it wants are, in order, First Name, Last Name, Email, Date of Birth, Postal Code, and you don't need to enter a phone number. It then asks if you have kids and what consoles you have with two last legal checkboxes to check about understanding PS+ TOS and signing up for promotional emails.
The code expires on March 1, 2013 if you want to hold onto it for a bit.
Edit: I'll add that for those that have US PS+ and want to check out the unique stuff that they have, this is what you can check out right now (removing Vita since most of you won't go through the hassle to switch accounts):
Cubixx HD - 163 MB
Guardians of Middle Earth - 1.2 GB
Limbo - 94 MB
MotorStorm Apocalypse - 6.6 GB
Pinball Arcade - 343.5 MB - Cross Buy
Vanquish - 11.7 GB
Cubixx HD is leaving next Wednesday and Pinball Arcade is leaving on 2/20 with Sleeping Dogs and F1 Race Stars being added next Wednesday.