When you subscribe to a feed you usually get the last 10 or so items, feedcatch can change this by creating an archive out of a feed. I suppose if you subscribe to a feed in Bloglines it archives the posts onwards from the moment of subscription…I’m not sure how many it caches, ie. maximum number of posts per feed…but what about past posts.
To see past posts of a feed just alter the feed through feedcatch and you have an archive of all posts, it’s virtually another version of the blog or website that holds all the raw content…you can customise the expiry dates, etc…
See ResearchBuzz for more.
Like Research Buzz mentions, if you do a keyword search on a search engine or use a directory feed, and run it through feedcatch you will have an archived topic index (pass that around to your friends)…so this is moving away from using RSS just for the latest, it is using it to archive topic indexes to share…great new simple application.