To everyone that wants to be sure and get there shsh’s saved before sauriks server gets slammed with shsh requests from every jailbroken user in the world plus the new ipads on the market, I suggest you get your shsh blobs now. The main reason i say this is because saurik can’t handle all requests at one time and sometimes you will get a pending message when you open cydia. Remember that spirit is a user land jailbreak meaning that Apple is going to release a new firmware very soon after it’s release so for those of you who aren’t at the front of the line getting your shsh’s saved with sauriks server using cydia and your pending, say goodbye to your shsh blobs since apple stops issuing those as soon as a new firmware comes out and that is where saurik pulls your shsh’s from.. I apologize for the long rant but I just want my readers to know its better to be safe than sorry.
Thanks to Saurik for all of his hard work. Below is his explanation from saurik.com on how to downgrade your iPhone 3G S and also how to continue using his server for future Apple firmware updates.
Bypassing the Overlord
To this end, I have constructed a server that duplicates the functionality exposed by Apple’s signature server, except using “on file” results rather than live requests.
All we need, then, is to make iTunes use it. Luckily, most operating systems also have the ability to locally define bypasses on specific hostnames through a file called hosts. Using this, we can redirect requests to Apple’s signature server to Cydia.
So, open the file C:\Windows\System32\drivers\etc\hosts (Windows) or /etc/hosts (Mac OS X) and add the following entry to the bottom of the file.
74.208.105.171 gs.apple.com
Now, when iTunes thinks it is talking to Apple, it is talking to Cydia Read more…
Caching Apple’s Signature Server
Please, for the love of all that is holy, do not e-mail me if you have problems. Instead, go to ModMyi.com, where there is a special forum called 3G[S] Downgrading, created for the purposes of this article.
Seriously: there is no way I could possibly hope to answer even the number of e-mails I’m currently receiving regarding this, and the article isn’t even out yet. There is this wonderful scene from Bruce Almighty where Bruce sees his e-mail inbox: that happens to me every day. 
I have very little respect for Apple at this point: I make no secret of this fact. Apple, as a company, has turned into a corporate hypocracy, embodying the very ideals that it claims to be rebelling against. “Think Different”, as a slogan, has become a cold criticism of their own actions with regards to their product lines.
The Next Hope
Apple is not just a computer company: Apple is a movement. This concept was finally and truly cemented in the public mindset when Apple carved itself a lasting place in the history of marketing with its 1984 superbowl commercial for Macintosh.
Styled after the classic Orwellian distopia, 1984, this commercial was set in a future where all aspects of individuality had been stamped out by the overlords, constantly vigilant, watching from their television monitors.
This world, as well as everyone in it, was rendered in a blue and gray: some believe we are to see the overlords as IBM, well reknowned for their corporate beaurocracy, and soon to be hated for trying to control our very thoughts with their bland machinery.
Others, including the creative director of the commercial, Lee Clow, state that the commercial represents the abstract struggle of “the few against the many”: Apple’s Macintosh standing as a symbol of “empowerment”. [Wikipedia]
The True Enemy
However, as time grew on, Apple’s real stance on individual expression and “empowerment” in particular, became clear: they are staunchly against it. Apple’s insistence on controlling the experience of their products sounds very similar to the “garden of pure ideology” expoused by the Big Brother in their own commercial.
Today we celebrate the first glorious anniversary of the Information Purification Directives. We have created, for the first time in all history, a garden of pure ideology: where each worker may bloom, secure from the pests of any contradictory… thoughts.
Our Unification of Thoughts is more powerful a weapon than any fleet or army on Earth. We are one people: with one will, one resolve, one cause. Our enemies shall talk themselves to death and we will bury them with their own confusion. We shall prevail!
The Point of Jailbreaking
This is why many of us (upwards of 10% of all iPhone users, in fact) “jailbreak” our devices: we want choice. We believe that Apple has maintained its lead as the best mobile hardware platform provider, and Read more…