I am a little late on the reply to this Steve, but most of the ideas from the list below were observations turned suggestions of mine compiled from around 2003 when I was studying Plan 9.
There would have been less code in the contrib at that stage... for one... fgb seems to have most of his work around the 2006-2008 time
/Conor
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- A device driver for Plan 9 for an unsupported device
- A GUI builder for the Plan 9 control graphics library
- Porting of the Tcl tool-kit Tk and the Tk GUI builder Xf
- VRML support for the Httpd
- Writing of an editor similar to Vi for Plan 9
- An Html front end to the PQ database system. This would involve adding PQ support to the Httpd
- Java support for Plan 9
- A lockable screen saver for Plan 9
- Mpeg support for Plan 9
- Addition of load balancing support into Plan 9