Pier to Pub Swimming Training

I am participating in the 2010 Pier to Pub at Lorne on January 9, 2010. It is a 1.2 km open water course. I heard that the rule of thumb is that for every 1km of open water swimming is the equivalent of 2kms in the swimming pool. Thus my target is 2.4km in a swimming pool (48 laps of a 50m Olympic sized pool). My progress via Google spreadsheets (which is automatically updated) is below:

Related posts:

1. Beep Test
2. Half Marathon Training Day #9: Swimming.
3. Pier to Pub 2010 Completed