First of all: some setup. Split your view and create an outliner view on one side.
Go to front view (numpad 1), press space on your 3d view, add a text object, type M, and press tab to get out of edit mode. Move it to the center of the grid on the X/Y axis, but don’t move it’s Z axis. In other words, don’t move it up or down; keep the bottom of the letter on the grid “ground”.
Convert the M to a mesh by pressing Alt-C.
Simplify the font: you’ll probably find that your M is too complex. For example, the bottom middle part of the M (inverted V tip) is two vertices with a line rather than a simple point, on my system. This would make later stages much harder. Simplify your M by selecting those two vertices in edit mode (tab, then select the vertices with right-mouse-button and shift-right-mouse-button), pressing w, selecting merge, then selecting “at center”.
Ideally, this will Give you an M with 12 vertices: Two at the top of each “pillar”, two at the bottom of each pillar, two in the middle, and one at each side, where the “V” and the pillars meet on the bottom edge of the V. Next, you’ll need to add faces. You should have 6 faces: two for the pillars (a quad and a tri), and two quads in the V. Press tab when done.
Creating more Ms: Go to top view, right-click on your M, and make two duplicates by pressing D and then tab twice. Note that they’re all on top of each other, and you can’t see them, but never mind that; they’ll show up in your outliner.
Select the first Font object, rotate it 120 degrees by typing N, then putting 120 in the rotZ box. Rotate another 240 degrees by selecting it in the outliner, and putting 240 in the rotZ box.
If you middle-click and drag your 3d view now, so it’s just up and to the left or right of your model, you should see that you’ve got three Ms, all in the same spot, but rotated.
Move the Ms to the right places using g, and the x/y buttons to limit movement to one axis. Move two out to the left and right (using g followed by x, followed by mouse movement, and then a left click or space). Move the other down, by g + x, and the other steps.
Now, select all three objects: right click one, shift-right-click the other two. Join them together using Ctrl-J (or space -> “Object” -> “Join objects…” ). Confirm by choosing “Join Selected Meshes”.
Now, you’re almost done. Press tab to get into edit mode. You’ll probably be able to see that, in each place where your Ms meet, there is more than one vertex. Don’t worry. Right-click one, then hold shift, and right-click the other. Press w->merge->at center, as before to simplify the model, linking the two Ms at that point. You’ll need to do this six times, for top and bottom of each M’s meeting edges (the three corners of your logo’s triangle).
Now, really almost done
Select the three top vertices of one of the corner pillars. They should form a small triangle. Press f, to make a solid face. Now, select the two inside vertices of that triangle, and follow the edges down the “V” of the Ms on two sides, adding the next two vertices down to your selection. These should form a quad. Press f to make a solid face. If you do that for the other two sides, the top of your logo will be complete, except for a triangle missing in the center. Just select the vertices that make up the triangle, and press f.
Now, rotate your view, so you can see underneath. You’ll need to fill in the faces the same way, at the bottom of the pillars, on their inside edges, and then three quads for the underside of “V” parts’ slopes, and a tri their base.
If you want to make it look nicer, try adding a subsurf modifier (this will make it look horrible initially) then bevelling all of the outside faces on the model, as well as the triangles at the base of the slope, top and bottom.