Have not sailed seabourn but we did a trip to Norway last summer
Fantastic
Bergen you can DIY ..be sure to ride the Floban
Oslo also a DIY there is a HOHO bus that stops right at the docks but you can also walk into the city centre about 10 minute Take the ferry over to the Kontiki Museum
Get a transport pass at the cruise building
The Oslo Pass - Official Travel & Visitor's Guide to Oslo, Norway - VisitOSLO.com
Are you going to the North Cape?
Any other questions on Norway I will try to answer
Enjoy
some photos from our trip
Oceania Norway 2010 pictures from cruises photos on webshots