Ask HN: Twitter archives?

I am not having much luck finding a good source of total Twitter archives. Some luck finding people that archive the partial firehose API (spinn3r.com for example, but they are too expensive for me now anyhow). I don't need it to be realtime which is why I thought I could find something workable. I need it to return all 'tweets' that contain any of about ~200 keywords. Missing the last 12-24 hours would not be an issue.