I've kept on keeping on, and now the 100 push-ups per day streak stands at 300 days.
I'm also just a couple hundred (less than a week) away from having done 50,000 push-ups since beginning this journey in September 2008 - see spreadsheet.
I looked back at the post where I had done the 100 push-ups in one shot, and how I had it in mind to try to repeat this feat once a week, well that hasn't happened, but many days now I just do 2 sets of 50 push-ups less than 5 minutes apart. Its great that I've gotten that far along that I can manage this without straining myself too hard. And it gets done quicker!
Thanks everyone for the support along the way. Only 65 days now to make it a full year, and then why stop there? How far do you think I can go?