I've no idea if the wine is any good, but hawthorn jelly is absolutely delicious. It's a strange thing to make - the bright red berries turn brown when you boil them, and produce purple juice (and therefore purple jelly).
Collect as many haws as you can, put them in a pan with water to cover, and boil for 60-90 minutes, strain overnight and then add 1Lb sugar per pint of juice. Boil on the highest possible heat until you reach setting point, then bottle as normal.
The only down side to hawthorn jelly is that you'll use a lot of fruit for relatively little jelly. For most non-citrus fruits you'll typically get about 1.5Lb jam/jelly for every 1Lb. For haws the proportions are very roughly reversed. I collected about 5Lb of haws last year, which made about 3Lbs of jelly. The flavour is quite distinctive though, and well worth the effort.