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Twitter is about to close another round of funding, perhaps setting its value at $80 million, and hype for the service is running at all time high. So we'll forgive the two tech-savvy San Francisco bloggers who both saw this advertisement for a longstanding Facebook Mobile feature which allows users to update their statuses via SMS and called it Facebook's response to Twitter. Not correct. Facebook has allowed users to do so since April 2007. Still, I understand why Facebook is exhibiting a bit of Twitter jealousy and advertising the feature heavily now. Last weekend, my little brother graduated from Davidson College outside of Charlotte. At a coffee shop in town, Twitter came up in conversation with another patron. That's mainstream — while Facebook's mobile features still aren't popular on the social network's home turf.