I would love to see this as well.
My company is currently using Rackmonkey (https://flux.org.uk/projects/rackmonkey/) to keep track of it's racked servers and such. Rackmonkey can do rack diagrams on the fly based on the rack name and the "U" spaces used by your servers/equipment.
But why re-enter a bunch of info into Rackmonkey, if Lansweeper could get this information and diagrams already.
Here's a sample Rackmonkey rack diagram from its website: