Help with reading RSS feed.

Hi All -

I am working on a app that reads RSS feeds . The RSS feed I am trying to read is huge (~ 4000 items) and store them on the iphone sql lite. I want to store it so searching is easy and the feed doesnt have to be accessed everytime .

How do i make sure that the app reads the feed efficiently not locking the app. Currently, I am using delegate to spin a thread to go after the list. But, having trouble restarting if the user quits the app in the middle of downloading the feed..

Any ideas?

Thanks in advance..