Latest F1 2013 driver line-up

18 drivers so far announced for F1 2013, leaving just 6 seats still to be officially confirmed, assuming HRT continues...
Confirmed 2013 F1 drivers:
Sebastian VettelGermanyRed Bull-Renault
(Confirmed for 2013 and 2014, but there are performance clauses)Mark WebberAustraliaRed Bull-Renault
(Deal expires at end of 2013)
Fernando AlonsoSpainFerrari-Ferrari
(Confirmed for 2013, with options for 2014 and beyond?)Felipe MassaBrazilFerrari-Ferrari
(Deal expires at end of 2013)
Jenson ButtonBritainMcLaren-Mercedes
(Signed 'multi-year deal' in October 2011)Sergio PerezMexicoMcLaren-Mercedes
(Signed 'multi-year deal' in October 2012)
Kimi RaikkonenFinlandLotus-Renault
(Signed two year deal in November 2011, second year was an option)
Lewis HamiltonBritainMercedes-Mercedes
(Deal expires at end of 2015)Nico RosbergGermanyMercedes-Mercedes
(Signed 'multi-year deal' in November 2011)
Nico HulkenbergGermanySauber-Ferrari
(Signed deal for 2013, contract length not announced)Esteban GutierrezMexicoSauber-Ferrari
(Signed deal for 2013, contract length not announced)Robin FrijnsNetherlands Sauber-Ferrari
(Signed test and reserve driver deal for 2013)
Pastor MaldonadoVenezuelaWilliams-Renault
(Signed deal for 2013, contract length not announced)Valtteri Bottas FinlandWilliams-Renault
(Signed deal for 2013, contract length not announced)
Daniel RicciardoAustraliaToro Rosso-Ferrari
(Signed deal for 2013, contract length not announced)Jean-Eric VergneFranceToro Rosso-Ferrari
(Signed deal for 2013, contract length not announced)
Charles PicFrenchCaterham-Renault
(Signed 'multi-year deal' in November 2012)
Timo GlockGermanyMarussia-Cosworth
(Signed new 'long term deal' in July 2011)
Pedro de la RosaSpainHRT-Cosworth
(Deal expires at end of 2013, although future of team is currently uncertain)
Michael Schumacher GermanyRetirement
Likely candidates for remaining seats...
Romain GrosjeanFrenchLotus-Renault
Paul di RestaBritainForce India-MercedesJules BianchiFrenchForce India-MercedesAdrian SutilGerman Force India-Mercedes
Max ChiltonBritainMarussia-Cosworth
Heikki KovalainenFinlandCaterham-RenaultVitaly PetrovRussiaCaterham-RenaultRubens BarrichelloBrazilCaterham-Renault
Narain KarthikeyanIndiaHRT-Cosworth
Jaime AlguersuariSpainIn talks with 'several midfield teams'Kamui KobayashiJapanFuture unknownBruno SennaBrazilFuture unknown