This I grant you! Come back and post anytime so long as you don't post two consecutive wishes without somebody else's wish in between. Also you need to grant a wish for every wish you want granted.

I wish for a superwish.

Granted! It was this one. Sorry, you wasted it.

I wish for the ability to predict weather 48 hours in advance.

Oooh, nice choice. The forecast is sunshine all day tomorrow and... Nothing after that.

Pity. (Edit: The world has ends in 24 hours if you don't get it.)

I wish for the ability to summon anyone in the world to where I am.

You summon them to you. They are now in your body. Your cells have melded together into some fleshy atrocity. You are dead. They are dead.

I wish to know what religion is real.

This I grant you! They're all real. From Zoroastrianism to Pastafarianism, they're all 100% existent, genuine social constructs. As for how well they reflect the true cosmology of our world, well that's not for a humble genie such as I to say.

I wish for a hot red Swingline stapler.

Granted! It is very nice and hot. In fact, it's on fire. Did I mention it appeared among your most important papers?

I wish to have unlimited access to good, Swiss chocolate.

Unlimited you say? Granted. You shall never be without a source of chocolate raining down upon your head. Call it, your personal chocolate raincloud.

I wish for fists harder than stone.

This I grant you! Fists of solid steel! I don't now why you went for fists though, most people get prosthetic hooks instead.

I wish for the ability to speed read.

Granted! (with a flourish of hands) You can now read any book in less than one minute, but your memory is decreased in a proportional manner. You don't remember even your own name now.

I wish for the cure of all diseases.

It pains me to have to do this to you buddy, but alas I must.

I grant your wish. The cure for all diseases is within you. All you have to do is touch a diseased party and the disease is transferred from them to you. You can cure the world, but you'll die trying.

I wish I didn't have to put a twist on wishes I grant to others.

Granted! You are no longer capable of granting wishes, and thus freed from the burden of twisting them.

I wish that other people will grant my wishes without twisting or corrupting them.

Granted! (with a flourish of hands) Your wishes are not corrupted by anyone anymore, none will have this burden anymore, but you will still receive a randomly generated twist every time you make a wish.

I wish for a lollipop.

Granted! You now have a copy of the 2008 Indian movie LollyPop! On HD-DVD!

I wish for waffles.

Granted! (with a flourish of hands) You are now a friend of Waffles the Cat on Facebook. Cheers!

I wish for other Rambo movie.

Granted! Next year will see the release of Rambo: The Video Game: The Movie, produced and directed by Uwe Boll!

I wish for a way to know ahead of time if I would like a film or not, without getting spoilers.

Granted! Unfortunately, that knowledge comes printed on small white strips of paper hidden inside fortune cookies, produced by a small family-run Chinese restaurant in Liechtenstein.

I wish all fortune cookie messages would come true.

Granted! From now on, all fortune cookies contain the follow message: Someday, you will die.

I wish that tango was an innate skill that all humans were born with.

This I grant you! Of course now that all those toddlers are tangoin' the dance's sensual associations are gone. Still funny to watch babies dancing though.

I wish for superior English skills.

Edit: ninja'd.
Granted! However, now that you both speak and write in only Olde English, only a handful of people in the world can communicate with you. And they're all old men.

I wish cliché / corny pick-up lines had the opposite effect on women.

This I grant you! Girls now interpret your pick up lines as put downs! Instead of mild amusement they feel devastating sorrow.

I wish kiwi birds had the power to fight back against feral cats and possums.