> Normally, a really bad idea, unless it comes from the Cantillon
> brewery in Brussels, Belgium, home to the Vigneronne and St Lamvinus
> grape lambics.
>
Hmmm - that isn't quite the same thing, D. Those are lambics, refermented
with grapes. Seen the hardiness of the lambic beasties, I don't give much
for the fruit yeasts, unless in the very early stages of fermentation.
However, there are some beers that are a mix of wine and beer. Zannekin from
the Dolle Brouwers is the most recent one. Not their best try, IMO. Witkap
Tripel from Slaghmuylder has had a 9% addition of white wine for the longest
time.
And a few decennia ago, there was a German brewery, forgetting the name for
now, which had a mixture of Bier & Sekt (German sparkling wine).

Joris