[Jace]

your ping list is fine, just be careful with some of the sites that ping to multiple places, if you ping a certain service or site too much they will ban you...and the big problem there is you never know if they ban you or not because you don't get a confirmation or anything that you have pinged them

not sure what you mean by meta and content dealing with spiders

any content will get eaten by spiders, doesn't matter where it is, I use AutoMeta for wordpress that automatically creates meta tags for each post page depending on what is in the post itself