Hello Richard,
you should probably have read the thread on the PostgreSQL -hackers 
mailing list I've linked to... at least you didn't make Tom's point ;-)
Richard Levitte - VMS Whacker wrote:
>   1. Do you want to stay with CVS or do you want to move to something
>      else?
Most PostgreSQL developers currently want to stay with CVS. Only some 
desperate souls including myself are fiddling with other VCSes.
>   3. What would you want a replacement to be able to do?
That's being debated, with many voices saying: CVS (plus our own 
hackery) provides all we need.  (And be warned again: as soon as you 
point out an advantage of your favourite VCS, you're making Tom's point. 
;-) )
> So far, I'm getting the sense that there are a lot of opinions on what
> replacement system to use, a bit carelessly before having answered the
> above questions thoroughly.
How did you get that impression? I'm currently *using* monotone for 
Postgres-R development, doing cvs_import and propagating to my branch. 
And I know others did the same already, too.
Regards
Markus