Hi Darina,
-Client/Web support
No web support at this stage (we are a Notes-Client only site here), but I don't think there is much work to adapt the UI scripts. If you're interested in persuing this development I'd be happy to give you detailed pointers :)
-Which versions of LN client are required for: server where it runs, client machines of regular users, client machines of developers/admins.
LN Client I recommend is 6.5.4+ and server 6.5+. I cannot say we've done any version testing, but the only real issue is anything to do with DXL, since it changes a lot between versions. For development/admin, the more recent the release the better, for normal users, not so important (probably 6.0 or even 5 would be fine). Sorry! Can't give you reliable info regarding this.
-Any browser requirements ?
See item 1!