The side project by Ben Gibbard and Jimmy Tamborello is one of the best selling and well known Sub Pop albums of all time, and with good reason. Created by sending tapes across the country through the USPS (clever name huh?), this album fuses Gibbard's vocals with Tamborello's electronic music skills amazingly well.
I actually chose this since Ben Arnold recommended Owl City to me, after which I had to listen to this instead. Owl City is nice, like way way too nice for my extended listening, but they are definitely fans of The Postal Service.
This album is a bit of a modern classic, if you havn't given it a listen, I highly recommend it.
Know by Heart is an album by The American Analog Set, introduced to me by 
A side project featuring a member of Vampire Weekend (Rostam Batmanglij) and a member of Ra Ra Riot (Wes Miles), this takes the sounds of each band and rams them through the electro-pop/Auto-Tune machine and produces something that is different but not all bad. While the entire album isn't fantastic, and at times I can't tell if they are mocking the Auto-Tune, there are some gems that can be pulled out.
DISCLAIMER: A 
The latest from Phoenix (apparently a French super group) is one of the better albums of the year and also happens to be a great summer album. Tons of fun, while also having a lot of quality as well, this is one of those albums that you can listen to on repeat while driving around with the windows down. My only complaint is that it is a bit short.