Services I have joined lately

As you quite possibly know (as you are reading this) I join lots of new services that pop up. Almost all of them, as I come by them, and if they let me in (which can be tricky enough at times). The reasons for this varies of course, but one of the main things is that when colleagues and/or clients ask me if I have heard of a particular service I prefer to have first-hand knowledge of it. Also, obviously, I don't...