Elliot Back’s list of RPC and RPC2 URIs to ping looks really long, with 41 different URIs in it! Pinging all of them should take him a while, I should say. It includes ping-o-matic, and so is redundant, to a certain extent.
I hope ping-o-matic grows to include at least a few of these. I don’t want to wait on my weblog — no thanks, I’d rather have pingomatic do the donkey work.