Are you trying to suggest those names are just as bad as hers?
Um hel-lo?
At least Facebook isn't called 'Zuckerborg' or something.
She's founded a social network named after herself! The height of megalomanic pomposity.
Give up. A site that is phonetically pronounced "mention" that is a micro logging site makes way, way more sense than any of the others. Because, you know, you mention topics that interest you.
So why not just go for a domain along the lines of www.mention.it? Rather than something that sounds like a noise you make on the toilet after a really hot curry.