VecMultiVec?

[Boyce Griffith]

Hi, Folks --

I'm pretty sure this has been discussed in the list previously, but I'm 
having trouble digging up the thread in the archive, so apologies in 
advance...

I need to solve some nonlinear equations that involve both PETSc Vecs as 
well as data that is stored in a non-PETSc-native format, and I was 
wondering if someone happens to have a freely available implementation 
of a "VecMultiVec" --- a vector which contains multiple Vec objects.  I 
think it should be fairly straightforward to implement such a beast, but 
I thought I'd ask before doing it myself.

Thanks,

-- Boyce