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Here's a little information about PocketShield:
POCKETSHIELD!!! It's a great program which let you answer by sliding your finger, but in a different way than the S2U2, and I find it quite attractive! You'll slide downwards!
Also, it can protect the screen under a conversation! (You will have to slide your finger downward from screen to unlock so you can press anything! BUT you can dissmiss a call/end a call by pressing the hardware button)
Heres the link.
http://www.pocketshield.net/default.htmVisit the site! And SEE IT IN ACTION (It's a tab on the site which will give you many videos of it in use!)

Try it! It's refreshing and quite nice! =D
-Tkima1http://www.alltouchpro.com/index.php?topic=1028.msg4842#msg4842___________
Aright so I gave pocketshield a shot. A little confusing at first but it's working out.
Personal Flaws:
-It's a little dull, not much going on, it's pretty much a black screen
-There's no showing of where you're supposed to slide down, you just kind of find the top and slide it down
-It has a on screen battery image but it's a tiny little line at the bottom (Boo)
The good:
-Smooth
-Shows notifications
-A good amount of customization available
-Many different unlock methods
-Themes are available for download or creating (I'm working on one right now actually)
-TMerChttp://www.alltouchpro.com/index.php?topic=1028.msg4905#msg4905___________
Aright so I gave pocketshield a shot. A little confusing at first but it's working out.
Personal Flaws:
-It's a little dull, not much going on, it's pretty much a black screen
-There's no showing of where you're supposed to slide down, you just kind of find the top and slide it down
-It has a on screen battery image but it's a tiny little line at the bottom (Boo)
The good:
-Smooth
-Shows notifications
-A good amount of customization available
-Many different unlock methods
-Themes are available for download or creating (I'm working on one right now actually)
Personal Flaws:
-It's a little dull, not much going on, it's pretty much a black screen
You can download new themes from http://www.pocketshield.net/themes/ when downloaded just install the .cab 
Hope this helps! =D-There's no showing of where you're supposed to slide down, you just kind of find the top and slide it down
You should slide it from the top of the screen all the way down until it unlocks =D
Watch the videos here, they'll help you 
http://www.pocketshield.net/demo.aspx-It has a on screen battery image but it's a tiny little line at the bottom (Boo)
Do you want it bigger?
Open the settings, ::Design::Layout and Background (-> Save "Name on theme" if you've installed themes)::Then you can either split of classis, and all at the bottom it says Show Battery, uncheck if you don't want it, and press the [...] and incrase the Battery Line Width if you want it bigger.Also remember that between the check and the big green A with a circel around (The OK and Activate button) If there's a Screen with a "!" in, press on it, and the pocketshield logo will show, this means that it's activated
And 3.5 .NET Compact Framework is required! (For those who didn't manage to open it!)
Here's how you get it! 
Hope this helps! =D
-Tkima1http://www.alltouchpro.com/index.php?topic=1028.msg4926#msg4926___________
Ohh, and also in Battery [...] You can change color and so on, it's quite flexibel
The Classic mode will make the Clock and Notifications come together, and the Split will part the clock to the top and notifications to the bottom of the screen!
Also remember that you can unlock screen by multiple options
By lightsensor! (Press the + in Unlocking) then calibrate, you'll get more info when you do this)
By Finger slide (This is the slide down from top to stop

)
By movement gestures (Press the + to get videos and options on how you can move your hand to unlock)
By round center button (Haven't tried this yet, but I think that it's by pressing ENTER button)
By stylus out (by taking your stylus out from it's container)
Also you can add vibrate to unlock, which is quite neat

If you go to Phone, you can Protect screen while talking, this is nice, under a conversation you can't press anything!
Also, Protect incoming calls, which will make you slide your finger downwards to answer or ignore

Also it can be good to know that S2U2 IS draining your battery!!
Pocketshield, ISN'T!
-Tkima1http://www.alltouchpro.com/index.php?topic=1028.msg4927#msg4927___________
Hope this helps 
(From post:
http://www.alltouchpro.com/index.php?topic=1019.msg5900#msg5900)
To answer some questions;
1. I prefer pocketshield (even though you need to pay for it).
2. No, there is this battery draining in S2U2.
3. Pocketshield does NOT have a battery draining ability.