Should we post before and after results?
Sure you can post the before or 'starting' result now or Monday or whenever you want to start. Posting a goal with or without a date is good but optional. It's really enough to just post updates on the start count.
I'll eventually prepare a graph of everyone and put it on the first post. There's no rules on how you want to approach this. A goal does not have to be set, you may just want to see how it goes first. After all the main point is only *motivation* it's not a competition. The winner will not get an ipod.