Alright ladies and gents. I've seen a lot of tabs for the end portal song
with that Ellen chick, but this one is the acoustic way that John Coulton actually
plays it on youtube.
link here: http://www.youtube.com/watch?v=sxNmeMklFk8&

Good song, here's how he does it.

*This is the basic picking part for the verse, played 6 times for each verse
E||--------------------------|
B||--------2-----------2-----|
G||-----2-----2-----2-----2--| x6
D||--2-----------4-----------|
A||--------------------------|
E||--------------------------|

E||--------------------------|--------------------------|| *Here I like to
B||--------3-----------3-----|--------3-----------3-----||  add the base E
G||-----------4-----------4--|-----1-----1-----1-----1--||  note too, but
D||-----4-----------4--------|--2-----------2-----------||  he doesnt do it
A||--2-----------2-----------|--------------------------||  so I left it out
E||--------------------------|--------------------------||


*When coming to a chorus, he'll strum an F chord after the last E7 in the verse like this.
E||-----------0--||
B||--------1-----||
G||-----2--------||
D||--3-----------||
A||--------------||
E||--------------||

The chorus are just simple chords. I'll take the second chorus lyrics cause I like them 
best
          C (x32010@1)       G (320003@1)         F (133211@1)       CNow (x32010@1)these points of data make a beautiful line
    C (x32010@1)          G (320003@1)        F (133211@1)          CAnd (x32010@1)we're out of beta we're releasing on time
      Dm7        G (320003@1)              C (x32010@1)     C/Bm         AmSo (x02210@1)Im GLaD I got burned, think of all the things we've learned
        F (133211@1)        Em7             AFor (x02220@1)the people who are still alive


*The chords for the strummed verse are just A major and F#m without the low and high F 
Bm and Em7

E||----------------------|----------------------||
B||--2----2----2----2----|--2----2----2----2----||
G||--2----2----2----2----|--2----2----2----2----||
D||--2----2----2----2----|--4----4----4----4----|| x6
A||--0----0----0----0----|--4----4----4----4----||
E||----------------------|----------------------||

E||--------------------------|--------------------------||
B||--3--3--3--3--3--3--3--3--|--3--3--3--3--3--3--3--3--||
G||--4--4--4--4--4--4--4--4--|--1--1--1--1--1--1--1--1--||
D||--4--4--4--4--4--4--4--4--|--2--2--2--2--2--2--2--2--||
A||--2--2--2--2--2--2--2--2--|--2--2--2--2--2--2--2--2--||
E||--------------------------|--0--0--0--0--0--0--0--0--||


Thats all there is to it. Super excellent song.