After waiting all day for what was reported all over the Web and ironically Twitter itself as the don’t miss SXSW session, at least one reporter said the reality was a yawn. No Web platform announcement here – just something called @anywhere. While it seems an interesting product, it’s a little ho-hum compared to what was expected from the many thousands who crowded the auditorium, and some who couldn’t squeeze in.

Liz Gannes of GigaOm said that three-fourths of the way through the presentation by Twitter CEO Evan Williams she was surrounded by vacant seats.

Twitter’s new @Anywhere “seems to be like Facebook Connect, in that it allows users to log in around the web with their Twitter IDs (something that’s already somewhat possible today), but it’s also more oriented towards consumption and publisher tools,” reported GigaOm. “It will allow content creators to invite readers to follow authors on Twitter directly from the page, and bring in information from Twitter when users hover over a button.”

Williams didn’t announce any launch date, but said its “partners” (whatever partners really means in this case) are Amazon, AdAge, Bing, Citysearch, Digg, eBay, The Huffington Post, Meebo, MSNBC.com, The New York Times, Salesforce.com, Yahoo and YouTube.

Of course, we’re still waiting for word on the ad platform.