Law / Making a Polish ad online on a website to find / search for people? [9]

Is there any website similar to the polskiinternet.com people search, where I could post an online ad to look for a person? And also wondering if a moderator or someone could help me in translating my ad from English to Polish. Thank you.

Life / Polish Networking Sites / Facebook [10]

What are all the polish networking sites? I already know of nk.pl, gadugadu, zamba.pl, poczta.fm,interia.pl, wp.pl, onet.pl