Replacing Helix COM with XPCOM

[Brian Olsen]

As some of you might know RealNetworks has released the source code for 
their entire media platform.
I am currently working on a proposal on switching from their own COM 
implementation to XPCOM
and I could really do with some advice from some of you experienced guys.

First of all what are your thoughts on switching such a large code base 
to XPCOM is it to big a task?
I know that the C implementation of XPCOM has only been discussed and no 
real code came out of it but
is it still feasible to do it?
Is it very bad policy to use [notxpcom] in interfaces??
Would it be possible to port XPCOM to Symbian (just the basics, no xptcall)?

- Brian