If you spend all day long searching for something and are unable to find it either via normal searches or specialty searches, then either A) the phrase being searched for doesn't exist, or B) it is a niche that can be easily exploited. (There could be other reasons such as the fact that you may need to do a better job of searching, but let's just assume it's either A or B today).
Now, what if this niche strongly relates to one of the hottest, fastest growing niches out there right now? How cool would it be to easily dominate that? Well, folks, I'm pretty sure I've found one of those niches. I've been trying hard to find a desktop gadget and widget developer who is experienced in creating gadgets for Vista Sidebar, Google gadgets, Yahoo Widgets, as well as online widgets to be distributed via blogs, etc. I've searched high and low on search engines and "rent a coder" type sites only to come up empty-handed. And while I already know of one particular company that creates Vista Sidebar gadgets, I'm looking for coders who have some experience creating a gadget and porting it to all the different gadget/widget backends. Where are you people? Surely you exist! If you don't, you should!
If you are a programmer or someone who wants to exploit a niche and knows some coders, consider this one. You should be able to dominate in this field with just the minimum SEO applied to a page that details your services.
Oh, and hey, if you try this, and you make millions of dollars from my idea, how about letting me hire you for free now and then?