I'm happy to help. I'd prefer not to work with main character death fics (Harry or Snape) and have a preference for happy endings (though I can do angst, too, in a pinch). For a fic under 10,000 words, I can generally get it back to you within two days. If your fic is longer, please let me know ahead of time and I'll let you know how soon to expect it (generally three to four days).
I've never done beta work for art, but if you can't find someone with more experience and a better eye, I'll give it my best shot.
While I doubt this will come up, I'd prefer not to beta stories/artwork for prompts that I left. I'm totally selfish - if any are posted, I'd like to read/see them when they're finished and open to everyone. :)