About time!
Most of the bands I was going to mention have already been mentioned so i'll just echo what everyone else has said.
Against Me! are my favourite band of all time. Everyone needs to hear the album 'Reinventing Axl Rose, just total brilliance. They have a new album out soon, (has just been delayed until the summer

) I hope it is as good as previous albums. Although I fear it will go the way of their previous album and lose everything that was great about them.
Set Your Goals are my current favourite band, they have released a perfect e.p and a perfect album. Not too long, not too short, and every song is utterly great. They said they will not be releasing a new album for a while, which is bad news for me. However I don't know if they can top what they have already done, so am happy with an e.p and an album.
Propagandhi are a band that are not mentioned enough. their earlier albums (how to clean everything and Less Talk, More Rock) are immensely good although I'm not too keen on their later stuff.
Dillinger Four are another band I want to mention. they are on fat but have a unique style, definitely worth checking out.
That's all for now, more when I finish school!