1. Secure the /wp-admin/ directory
2. Hide your plugins
3. Keep up with patches and updates
Go Ahead and check your blog. 🙂
Update : I just found out that lots of Filipino bloggers are susceptible to Item # 2. So you better check your blog and hid your plugins.
Make Blank index.html at your /wp-content/plugins/ folder. You know who you are. Better check it or be sorry 🙂