Originally, the Cydia servers enabling you to download packages and sources were down, due to enormous use of them following the recent untethered jailbreak. According to Saurik Cydia should work fine for users now, but I’m sure there will be exceptions among the general public.
Saurik cited that the reason for the sudden server break-down, even through precautions were set in place, was that there was an official time and date of the jailbreak release, where normally many users take a while to notice it and the traffic is delayed for Cydia. In his own words, “So, the thing that is different about this jailbreak is that @evad3rs provided a specific time; normally, usage follows a wave of discovery.”
As to users that still cannot access Cydia, Saurik said exactly that “As some Internet providers (especially for users in lands distant to me) cache DNS entries “too long”, some users may continue to get fails.”. I don’t know about you, but I live in the United Kingdom and I’m still getting the same errors. Come on Saurik, we want Cydia!
So is Cydia working for you? Is it slow? Is it fast? Is it how you remembered? Let us know all about it down in the comment section below, and if any of you also live in the UK, or other countries let us know about the state of Cydia in your country.