Thanks ^Doom^. Doesn't look like anyone has done that.
Looking at the sripting it should be fairly simple - convert the Body's CRLFs or <br> and put that in the HTMLBody, i'm geussing the COM API will update the headers etc to suit. Of ourse i'd have to check the sender domain and there are always gotchas
I haven't got the time for all the testing that would be needed either.
It'll be quicker just to set everyones signature at the client, but i think it would be a great feature for a future hMS.