Political Contacts for Canadians... 

Your MP is your federal Member of Parliament. 
You can find your MP here: 
http://www.parl.gc.ca/information/about/people/house/PostalCode.asp?Source=SM

List of ALL current Canadian Members of Parliament (MP)

http://webinfo.parl.gc.ca/MembersOfParliament/MainMPsCompleteList.aspx?TimePeriod=Current&Language=E

Your MLA is your Provincial Member of the Legislature. 
You can find your MLA online here: 

BC: http://www.legis.gov.bc.ca/mla/3-1-1.htm

Alberta: http://www.assembly.ab.ca/adr/adr_template.aspx?type=mla

Saskatchewan: http://www.legassembly.sk.ca/members

Manitoba: http://www.gov.mb.ca/legislature/members/alphabetical.html

Ontario: http://www.electionsontario.on.ca/fyed/en/form_page_en.jsp

Quebec: http://www.assnat.qc.ca/fra/Membres/deputes.shtml

Newsfoundland: http://www.hoa.gov.nl.ca/hoa/members

Nova Scotia: http://www.gov.ns.ca/legislature/MEMBERS/index.html

New Brunswick: http://app.infoaa.7700.gnb.ca/gnb/pub/ListMLA1.asp

PEI: http://www.assembly.pe.ca/members/index.php