If you’re interested in continuing with NaBloPoMo but have trouble writing either on the monthly topic or thinking up something of your own, I recommend Daily Prompt.
Essentially, a new writing topic is posted daily and users can submit their entries based around the topic. At the end of each week or so, there’s a summary of submitted entries. It’s not specifically for blogs, although it suits them rather well.
I especially recommend subscribing via RSS. Nothing beats having new, fresh ideas every day to run with.
Writer’s block be gone! *Huzzah!*