Media Molecule has commenced sign-ups for a beta test for it's PlayStation Vita port of Little Big Planet. Given that previous betas for the series appear to have been actual betas (you guys know betas held a month pre-launch are glorified demos, right?) I wouldn't say this necessarily indicates a holiday launch for the title, but that's certainly a possibility.
The Vita needs to be a big a focus for Sony at this E3 as the Wii U will be for Nintendo, so if anything, we can gather LBP will definitely one of the games they show off.
Which is kind of interesting (exciting for fans) and disspointing as well. More ports; this is the trend the Vita needs to buck quickly. It's not bad per ce, but it wears thin quickly. Handhelds aren't like consoles. Exclusive titles are very much still alive and viable.
Whatever your view, you can sign-up for LBP's Vita beta below.