This information comes from the box/manual for Call of Duty: Black Ops on Wii…
“Expand your experience with downloadable content from the Call Of Duty Store. All downloaded content includes new features and maps found in Call Of Duty: Black Ops.
**Additional fees may be required for Add-on Content. This game allows you to connect to the internet and download add-on content (such as data or services) for Wii Points. Please keep the following in mind when downloading licences for add-on content…” etc. etc.
Looks like the Wii version is getting all the support of its bigger brother. Too bad Activision doesn’t feel like officially showing it off!