Here is a list of Black Lagoon fansites and blogs where you can find some new Black Lagoon photos, wallpapers and icons for your site :
http://roanapura.city.free.fr/black-lagoon-fanarts-icones-wallpapers-galleries-fansites.html

And here is the url of 3 black lagoon search engines :
1) Black Lagoon Sites Search (french)
http://www.google.com/coop/cse?cx=partner-pub-7095662153339975:lwh1e3bv8k9

Black Lagoon Search (japanese)
2) http://rikiriki.cool.ne.jp/cgi-bin/yomi-search/yomi.cgi

Black Lagoon Search and Community Site (japanese)
3) http://bl.skr.jp/bl/

I Hope it helps a little ;)