Good question. All we had was this: http://www.nufc.premiumtv.co.uk/page/NewsDetail/0,,10278~1354777,00.html
Well, when people are talking about contract renewals, Bassong isn't mentioned. He also would probably mention "my contracts up at the end of the season" in that interview. I'd assume he is on a 2 or 3 year deal.
.com just says "tbc" on contract length.