Hi and (late) welcome to EF!
I'm soon (very soon or i'll go nuts) moving to Lausanne with my girlfriend as jobseeker and she's very fond of inline skating. We were wondering the same thing, especially since the lakeside area of Lausanne seems nice for this sport.
Using google earth I've noticed there's a path of like 3km from Vidy to Ouchy and seems the floor would be good for skating.
While it won't be our priority due to our very tight budget until we find jobs, we will be skating in that area so someone else to skate with us will not only be fun but also makes me not be the only goofy looking skater out there
Meanwhile this is what I have bookmarked:
http://www.skatingland.ch/en/orte_de...827®ion=009