Last Updated: September 16th, 2011
Skysoft... errr, I mean Skype updated its previously measly Android device support from 5 devices to more than 20 today with the introduction of version 2.1 of its Android app. There are no new features outside of expanded device support, which was badly needed in order for the app to climb out of the sea of 1-star reviews (although stability and quality improvements would have made today's release even sweeter).
Last Updated: August 3rd, 2011
As a Canadian, I can't use Google Voice in order to send my SMS. However, there are numerous apps that act very similarly, including the new DeskSMS from the developer who brought you ClockworkMod.
DeskSMS transfers SMS to both your e-mail and other IM applications through the use of your Google Account. This allows you to answer SMS on-the-go and with the use of a full keyboard. As someone with big fingers, I can't tell you how annoying it is to try to do a large amount of typing with an on-screen keyboard.