The blogroll in the sidebar was automatically generated from feeds to which I subscribed in Google Reader. Google Reader has gone to the great hunting field in the sky or something: I am now using Feedly to read all your blogs. Feedly is a brilliant feed reader and the iPad app is superb, but it does not have a facility for generating a blogroll. (There seems to be some buzz around that blogrolls are a thing of the past.)
Anyway, sorry all your blogs have disappeared. I'll try to find some time to pay attention to the blogger generated dynamic list at the top. I know that gets people lots of hits.