Kingdra will be... painful. But thankfully that's not coming out till August (probally).
Now, Mach Punch isn't a very powerful snipe move. 30 + 10 won't win games (okay, yeah, it will, but oh well). Lucario and Magmortar have far supperior snipe moves. However, Ape has one thing going for Mach Punch - it costs only one Energy. And since using Rare Candy means that you CAN get it out T1, it can do a T1 30-10 spread. It's better used when you have too little Energy for Mega Bravo.
Mega Bravo is what really attracts the eye. Better then Vire's Discharge, because no flips are needed. With Typhlosion, you can easily be doing 80+ damage a turn, or if you want, 160 damage if you just keep your first Ape out their for an extra turn, using Mach Punc to spread, and even bring those 130, 110, or 90 HP aponent's down to 120, 100, or 80, which is easily in the OHKO range of Ape.
The HP is great, Gardeoir and Magmortar have that now. 110 means that opponent's who count in even numbers (Mag, Gallade, Gardevoir, Magmortar Lv.X, etc.) will need that extra Prize flip/Energy/attack. So, he'll be in there for a little longer then soomething like, say, Weavile SW.
The Weakness is bad. Not only does Empoleon give it headaches, but KINGDRA will be it's death (along with Mag). It's better then Psychic, Fighting, or Fire, but once Kingdra's released... Water is one of the worst Weaknesses. The good thing is is that Empoleon doesn't OHKO it without LB/SC/PP. But it still does 100 damage anyway...
Retreat Cost is one of the best things for this card. It has free Retreat Cost, so you Retreat when Ape is charged on the Bench, Typhlo the Benched Ape, attach to him, hit for 80/120. Nice. It also means he can get out of a sticky situation, then come back up later for a big KO, then they can KO him, but I bring up another Ape and KO that guy... Mach Punch when they are at 30- HP or they don't have enough Energy (though than you might want to go for the KO).
Overall, Infernape MD is a good card, strong attacks, small sniping ability, good HP, fast, and a bad Weakness. It goes well with Typhlosion MT, Blaze PK/GE, Delcatty, and Claydol (duh!). It has pretty good matchups against everything, at worst probally 40-60, except for Water decks. Well, Wailord fails against it, but Wailord fails against everything remotely fast, and Ape can easily dish out 200 damage (just stall with other Ape using Match Punch... you'll be ready in 3, turns to do 200 damage for the OHKO).
In future format: When Heatran Lv.X is released, this guy will be very near broken, with his only bad matchup being against Kingdra, and MAYBE Empoleon. Once you get 5 Energy on him... 200 damage every turn. It might also be a cool idea to tech in something that burns, to take full advantage of Heatran Lv.X. Maggmortar Lv.X might be good (150 every turn for only 3 Fire Energy). Though that might slow you down...