TinyUmbrella pre-4.1 update: Protect your baseband from 'accidental' 4.1 updates. On-demand SHSH retrieval from Cydia.

TinyUmbrella - New Updates with 4.1 looming...

Let me preface this by saying that it is important that you do not update to 4.1 if you wish to keep your unlock and jailbreak.
I've updated TinyUmbrella in anticipation of the imminent release of iOS 4.1. Here are some notable features. (Sorry I have not finished the changes I mentioned previously as these features I felt were VERY important with 4.1 coming)

• Baseband Protection - Updating to 4.1 using TinyUmbrella will protect your baseband from update.
• SHSH Retrieval from Cydia - If you don't have your SHSH locally, TinyUmbrella will request them from Cydia on-demand; allowing the restore to continue
• Automatically point hosts to Cydia - Once you close TinyUmbrella, it points your hosts file to Cydia (for further baseband protection and update/restores without TinyUmbrella)    Read More