Celebrity Cruises is offering onboard credit on holiday cruises booked Oct. 5 to 7. The credit is up to $300 per stateroom on applicable sailings of seven nights or longer, or up to $200 per stateroom on eligible five-night cruises.

Crystal Cruises announced its 2012 deployment, which has 68 itineraries with an increased presence abroad. Among the new program is a 94-day “Epic Islands and Empires” Pacific Rim World Cruise through Hawaii, the South Pacific, Australia, Indonesia, Southeast Asia, China, Japan, Russia, Alaska, British Columbia and San Francisco, including a three-day inclusive overland adventure in Beijing and a return to South Korea for the first time since 1994.

Silversea Cruises has launched a redesigned website that includes several new features for travel agents. The site opens to a muted-silver seascape and features images taken by photographer Dana Neibert to reinforce the Silversea brand.

With its return to Alaska for the first time since 2005, Crystal Cruises will offer new “Experiences of Discovery” options designed to entertain and inspire. In addition to wellness programming and creative culinary offerings, seven 12-day itineraries roundtrip from San Francisco will feature a performing arts focus, with an expanded series of Emerging Artists cruises.

Carnival Cruise Lines is offering best available upgrades on virtually all departures through December 2011. Carnival also offers up to a $200 onboard credit per stateroom for all Carnival Magic Europe voyages booked on Oct. 13. The WLCN best available upgrade offer applies to new individual bookings for stateroom categories 4A and higher. Upgrades are available within specific stateroom accommodation types (interior to interior, ocean-view to ocean-view, balcony to balcony).

MSC Cruises is offering a “The More the Merrier” rate with significant savings on the Christmas sailing of MSC Poesia in the Caribbean. The special rate is available on the seven-night Dec. 19 Western Caribbean itinerary from Fort Lauderdale.