Sorry to tote this old horn, but N900 is not Nokia's flagship, it is a tech-head Internet tablet with phone. Maemo is a work in progress and with regards to the OVI Suite too.
Expect lots more incomplete things. It should not be a surprise.
sorry my mistake. i know its expected that there are bugs to be iron out.
at first, i was confused as i thought the ovi store is the suite for the pc. found out the store was on the n900 (which still say coming soon on my phone).
I don't know if this changed anything, but before using apt-get I did log into the URL above and tried to download the games from OVI Store - this did start the app manager and did add the OVI repository.
I guess without this the apt-get would not have found the packages.
Earlier in this thread there are manual instructions for adding the OVI repository too.