I've really been into Owl City's and Neversaynever's sound, and I've been playing around with Reason 4.0 for awhile now, yet I still can't seem to get the particular "synths" and well just the general keyboard sound they get. Of course, I'm not looking to get the exact sound, but I keep getting sounds that are lengthy rather that some of the sharper notes they have. Like all the little bleeps and whatnot.

Any suggestions? Help?

Learn how to use Attack, Decay, Sustain, Release, Visualise the curve.
Attack - the time it takes for the noise to fade in.
Decay - the time it takes for the noise to peak.
Sustain - the constant at which the note is held while you press down on the key.
Release - the time it takes for it to shut up.

If you keep these values low you get beeps, if you turn them up you get a slow drawn out curvey noise.
Hope that makes sense.

Makes a lot of sense. I'll definitely try this out. Thanks so much!

And here I was thinking I was being sarcastic.

aww bless ya.

If you want to learn some very handy tips and tricks I can highly recommend a guy on Youtube called 'Ace Sphincter'. He goes through lots of the basics in reason and some pretty clever advanced stuff too. He's pretty easy to understand and did well enough with his music to move from the states to New Zealand - Jammy Sod. But I digress... check him out, he'll give you lot's to think about.

http://uk.youtube.com/user/AcePincter

Sorry, got the guys name wrong.