since they release updates several times a day, i wrote a small bash script to grab the latest version released and set it up as my default browser. (of course, this is for linux.) and this is specifically for the 64-bit linux platform. swap out the CHROMIUM_URL values in the script for your appropriate architecture.
#!/bin/bash
## get_latest_build.sh
## this assumes you've set up sudo
## if not, then change the sudos to "su -c"
CHROME_DIR=/usr/local/bin/chrome
SNAPSHOTS_URL=http://build.chromium.org/buildbot/snapshots
CHROMIUM_URL=$SNAPSHOTS_URL/chromium-rel-linux-64
#CHROMIUM_URL=$SNAPSHOTS_URL/chromium-rel-linux
PLUGINS_DIR=~/.mozilla/plugins
if [ ! -d $CHROME_DIR ]; then
echo "creating $CHROME_DIR..."
sudo mkdir $CHROME_DIR
fi
echo "get latest version number..."
wget -nv -O "/tmp/LATEST" "$CHROMIUM_URL/LATEST"
LATEST=`cat /tmp/LATEST`
echo "LATEST = $LATEST"
echo "download latest..."
wget -O "$CHROME_DIR/chrome-linux.zip"
"$CHROMIUM_URL/$LATEST/chrome-linux.zip"
echo "unzip latest..."
unzip "$CHROME_DIR/chrome-linux.zip" -d "$CHROME_DIR"
echo "rename the directory with build number..."
mv "$CHROME_DIR/chrome-linux" "$CHROME_DIR/chrome-linux-$LATEST"
echo "reset soft link..."
rm "$CHROME_DIR/chrome_linux"
ln -s "$CHROME_DIR/chrome-linux-$LATEST" "$CHROME_DIR/chrome_linux"
if [ -d $PLUGINS_DIR ]; then
echo "copy plugins directory into new chrome dir..."
cp -r $PLUGINS_DIR $CHROME_DIR/chrome_linux/
fi
echo "setting permissions on directory..."
chmod ug+rx "$CHROME_DIR/chrome_linux"
echo "done!"