I find drawing lines on Google Maps to be very difficult and poorly implemented - the link below has a link to a Google Map that I am doing for some friends - the link goes to a point that is close to the end of the trip line so visitors don't need to pan south 900 miles to see where my friends are now - there is a Send a link option for the points - I sent myself an email that had the link in it then embedded the link in the Post -
http://svcodeblue.wordpress.com/2012/09/30/san-francisco-alameda-sept-26-2012/
Then to add insult to injury Google Maps combined lines and points from a test map into the real map - so I have deleted the points which for some reason also deleted them from the test map - I spent a lot of time last night working on the map - but - my friends have a click on link the opens the map showing where they are now
You be welcome & Good luck with your blog -