1) I use Pingdom and hadn't seen Apex. Looks really good. Will definitely switch over.
2) Hey you're TJ Holowaychuk. I know you've since (mostly) moved on from doing a ton of Node contributing, but as someone who uses projects you've started and maintained for a long time, just wanted to say a big thank you for all your work in the open source community.
I'm also going to link your photography site (a) for those who haven't seen it. I know this it's slightly off topic, but everyone should see it.