Nick, when you try to reply to a post, you'll see a black bar along the top of the page. Click on the + sign (third item from the left) and in the drop-down menu that then appears, the first one is for a link; click on that and a window appears for you to add your URL (the second one is to add an image).
Definitely an improvement, and I don't find it slow as Jonathan Callaway found, though that's on a computer — it's hopeless on a smartphone. And you can vary the text and all sorts of useful things, making it bold or italic or whatever, change the font (eg, to Arial) or a different colour.
Richard Carter ● 2746d