A good old wine-newsgroup topic. For historical interest (recommendations
are not up to date), see last paragraph of a wine-newsgroup posting on the
subject from before Parker, Tanzer, or Suckling were on the radar generally
in the US. (This was on the wine newsgroup under its original name,
net.wines. Created 24 years ago this month.)
It's unlikely still to be on today's servers (very few of which existed
then) so here's a current link to Google's archive of it:
http://tinyurl.com/3vjrg
Cheers -- Max