Dead Island, multiplayer issues?

I have Dead Island for the 360, and my friend was able to join my game without a problem at all yesterday, it was suggesting games to join throughout... Today however, my friend can not join me, nor can he see me in his friends list on the game lobby. I can see his name, but it is greyed out. If i send him and invite, it comes up with an error saying "unable to connect to this person's game, please try again later". The only way I can join his game is by selecting his gamercard and joining the session in progress, but i wanted him to join my game as he is further than me and wanted to help me out.

I also can't join random matches now either, as they are all greyed out, and if i try a quick match, it tells me there are no matches with similar progress.... yes there are, it found 300 with similar progress, but it wouldnt let me join them.

I heard the PS3 got a patch recently, is the 360 version going to see one? I'm quite disappointed with this.