While I certainly would welcome anything that could help me find code, the reason I'd want it is to find reference code, not reusable code. I've been programming for, oh, two decades now and one thing I find myself doing constantly is finding a bunch of libraries or bits of code and coming to the conclusion that I should just write it myself because of one of the following:
1. The library/code is good, but doesn't quite work the way I want it to
2. The library/code is close, but getting it to work the way I want is painful
3. The library/code is bad
4. The documentation is bad/nonexistent
5. The license is prohibitive or annoying (i.e. it's not LGPL or BSD or the like)
6. I enjoy writing code and sometimes I feel I could do it more elegantly, or efficiently (I might just want a very specific and optimized part of it)
More often than than not though I just enjoy coding and I love learning to code by writing new code. The black box thing... eh... I like to tinker under the hood and find out how things work.
But my point is that finding code is not that hard. It's finding code that fits *exactly* what we want. Code is usually just not quite as modular as we'd like to believe and, if we're honest, as programmers we have a certain vanity about writing code so it does things My Way. :)