Sure, humor could help with pitching an idea or hurt it if used unwisely. But lack of information about what you specifically do will certainly hurt a lot more. In the slide 50/52 you say you've built the part that monetizes the rest of the (Internet-iPhone) gap but then the slideshow ends abruptly without any explanation. Sounds extremely fishy to me.
1. Clarity.
2. Brevity.
3. Uniqueness of product.
4. Uniqueness of pitch.
...and so on. If you can make your pitch more unique with humor in a way that doesn't cross any boundaries of taste (and if what you intend to be funny is ACTUALLY funny), then go for it!
For example, I saw a pitch to a room of startups, VC, and press that involved singing, dancing, weird accents, and a ukelele. I loved it and remembered the company's name, the product, the founder, the works. Because of that pitch (and their general attitude toward the tech ecosystem), that company's getting a video interview and a shot at a guest post on RWW.com.
Done well, humor can be a key component of a marketing strategy.
We had a phrase or two in our pitch (not the slides, but verbal communication) that were a bit humorous, and it happened to work really well. But it's very easy to overdo it, and ultimately, it's unlikely to make much difference.
I don't know what your product is. I've scoured your website and I still don't know what your product is. No sale.
(read the whole deck, clicked around, watched 30sec of a video)
