Hi KSCM,
I think it is safe to assume that the protests going on in Egypt right now may effect the timeline in which physical mail reaches the embassy in Cairo however the protests should not have an adverse effect on your sponsorship or permanent resident application. The only other issue that may arise is the timeline for approval if the embassy is closed until the protests come to an end. I found this link for you, if there are any closures they should post it on this site. Hope this helps.
http://www.canadainternational.gc.ca/egypt-egypte/index.aspx