Here is a new script for the subversion post-commit hooks.
It creates a rss feed containing information about the latest commit of collection of repositories.

#!/usr/bin/env bash

DESTINATION="/var/www/hacks/svn-feed"
ENTRIES="$DESTINATION/entries"
RSS="$DESTINATION/feed.xml"

TITLE='MLDB: Svn RSS'
LINK='http://matteolandi.no-ip.org/svn-browse'
DESCRIPTION='RSS feeds of the commits'
LAST_BUILD_DATE="`date -R`"

if [ $# -lt 2 ]; then
        printf "Usage: $0 path revision\n"
        exit 1
fi

REPO="$1"
PROJECT="`basename $REPO`"
REVISION=$2
OLD=$(( $REVISION - 1 ))

TEMP="`mktemp`"

printf "$PROJECT\n" >> $TEMP
svn log file://"$REPO" -r $REVISION >> $TEMP
cat $ENTRIES >> $TEMP
mv $TEMP $ENTRIES

printf "\n" > $RSS
printf "\n" >> $RSS
printf "\n" >> $RSS
printf "\n" >> $RSS
printf "
$LINK\n" >> $RSS
printf "$DESCRIPTION\n" >> $RSS
printf "$LAST_BUILD_DATE\n" >> $RSS

cat $ENTRIES | while read line; do
	repo="$line"
	read line
	read line
	revision=`echo $line | cut -d '|' -f 1 | tr -d ' r'`
	author=`echo $line | cut -d '|' -f 2 | tr -d ' '`
	day=`echo $line | cut -d '|' -f 3 | cut -d '(' -f 2 | cut -d ')' -f 1`
	time=`echo $line | cut -d '|' -f 3 | cut -d ' ' -f 3,4`
	pub_date="$day $time"
	lines=`echo $line | cut -d '|' -f 4 | tr -d ' lines'`
	read line

	printf "\n" >> $RSS
	printf "\n" >> $RSS
	printf "$author\n" >> $RSS
	printf "
$pub_date\n" >> $RSS
	printf "" >> $RSS
	while read line; do
		printf "$line\n" >> $RSS

		lines=$(( $lines - 1 ))
		if [ $lines -eq 0 ]; then
			break
		fi
	done
	printf "\n" >> $RSS
	printf "\n" >> $RSS

	read line
done

printf "\n" >> $RSS
printf "\n" >> $RSS

I decided to create a repository to collect these svn-hacks: track them under the name svn-tools.