New idea for UI:

|---------------------------------------------------
|      +       |        -      |
|   Add File   |  Remove File  | (These will be big pretty buttons)
|              |               |
|              |               |
|---------------------------------------------------
| Other Computers: |  Files shared by: [Computer name]  
|   Foo            |----------------------------------
|   Bar's Comp     |
|   ...            |  Foo.txt
|                  |  Bar.doc
|                  |  Lol.mp3
|                  |  ...
...
|                  |---------------------------------
|                  | My shared files:
|                  |---------------------------------
|                  |  MyFoo.txt
|                  |  ffshare.py
|                  |  pr0n.rar
-----------------------------------------------------------
|File1 +++++++
|File2 +++++++++++++
|File3 [ Completed ]
---------------------------

Notes:

• I'm trying to copy transmission and itunes.
• Difference between your files and other people's files seems suboptimal.