"So what?" I hear you say, "Isn't that what Photoshop was made for?"
My standard response has always been that it's better to fix it ahead of time instead of in Photoshop. What if you're shooting a portrait session and shooting in jpeg for fast turnaround and will only use Photoshop or Lightroom for basic corrections and sharpening? (If you're screaming right now about how you should always shoot only in RAW, go sit with your head between your knees until the blood gets back to your brain. We'll discuss your issue at a later date.)
What if you're using your DSLR for video or time-lapse? What then? Dust-spot a few thousand frames? I don't think so.
This however, may be the most elegant solution to sensor dust that I've seen in a while. It's the Fotga Pro Gel Cleaning stick. Basically, it's the same method we used as kids to get quarters from a street grate - bubble gum on a stick.
It requires you to be able to lock up your camera's mirror. Once that's accomplished, the end of the gel stick has a sticky, non-greasy mass of goop that you apply - carefully - to your dusty camera sensor. The offending crud inside your camera sticks to the goop.
When your sensor is clean, you can clean the goop with goop-cleaning paper, and then you're ready for the next dust storm. Pretty neat, I think.