I tried the swift key once and didn't like it.
I still have it so I may give it another shot.
I connect my evo 4g to my WiFi and use it like I would if I had a tablet. I get email with it. Use Google talk, play words with friends. Watch YouTube videos, surf the web. Stuff like that. Check xda and here. Really convenient. I just leave it in airplane mode and then turn on WiFi.
I have read that you can make it into a remote for your t.v. and stuff but I don't know how to do that.
Nexus 5 - Stock
Samsung Galaxy Nexus - Sold ; Nexus S4G -Broken
HTC Evo 4G LTE Black & White - CM10.3
Evo 4G - Sold
Nexus 7 - Stock KK