I have decided to jump in with both feet and begin using Twitter for collaborative research in lessons next week. This of course brings with it some new problems which need addressing. I noticed a while ago that Tweets aren't eternal, this didn't bother me too much until I decided I wanted access to older tweets. Now it is a real issue, because I want kids to have access to our class tweets utilising a given hashtag, weeks after the fact. I gather from the different posts I read, that 9-15 days is pretty much the average time they are kept and this itself is relative to the number of tweets etc...
I have done a lot of reading on this today, and I still haven't found a concrete solution to my problem. I tried to sign up with Tweetbackup but had log in issues and later came across the interesting TweetKarma in my travels through the Tweetiverse. I did however place an RSS feed on a query for our hashtag, in my PageFlakes account in the hopes that it will all accumulate there. Naive? Maybe, time will certainly tell. Being the untrusting sort, I am also going to back it up the old fashioned way, copying it all into shared Google doc. That way if in a week's time, when our class meets up again to use the collaborative research we compiled, the older tweets cannot be accessed, I will have a full copy to provide them with.
If anyone out there has a proven solution for this I would be very interested in hearing from you.