Egophiliac's tumblr for "Slice of Life" went blank and has stayed that way so far without comment or explanation, so for posterity's sake...
For new readers: "Slice of Life" takes place in Ponyville, eight years in the future, primarily through the eyes of Pound and Pumpkin Cake, their parents, and Pinkie Pie. Egophiliac's other MLP webcomics are "Moonstuck" (finished but still online) and the currently-running "Steamquestria."
@spyroguy22475: As noted, the tumblr is non-functional (you just get a blank page), and Egophliliac has moved on to "Steamquestria" (a "darker" steampunk humanized-MLP comic). When asked at dA, Ego mentioned there might be one more story and then the strip would end, but it looks like this is pretty much it. ...Which is really sad, because I loved what she did with all the kids--Snips and Snails, Diamond Tiara and Silver Spoon, the Cutie Mark Teenagers, even Twist and Pip. And Pinkie's "origin" story was a delight, a clear challenger to KTurtle's "The Story of Granny Pie" for my headcanon.
EDIT (1/3/2015) The Tumblr is back up at the moment.