Well, as the timestamps below will show, I sat on this news overnight and stupidly let it all come out elsewhere: iPad 2 Likely to Have 2048×1536 Screen Resolution.
http://twitter.com/#!/stroughtonsmith/status/26083830578290688
http://twitter.com/#!/mikecane/status/26084311207776256
http://twitter.com/#!/stroughtonsmith/status/26084437099810816
http://twitter.com/#!/stroughtonsmith/status/26084847843807233
http://twitter.com/#!/mikecane/status/26085113582321664