No there isn't, but Akihabara isn't very interesting to a hacker; For the most part it's a tourist destination selling pop-culture artifacts. What you want is a US equivalent of the SEG market, which doesn't exist either.<p><a href="http://www.evilmadscientist.com/2009/a-visit-to-the-electronics-markets-of-shenzhen/" rel="nofollow">http://www.evilmadscientist.com/2009/a-visit-to-the-electron...</a>
In NYC go to B&H. Not sure if it's directly equivalent, but it's kind of like a mad, orthodox Jewish cross between Best Buy and Santa's workshop.<p><a href="http://en.wikipedia.org/wiki/B%26H_Photo_Video" rel="nofollow">http://en.wikipedia.org/wiki/B%26H_Photo_Video</a>