We have few good posts in Oracle community this week and here are they, and very interesting though
Jonathan Lewis on Systimestamp puzzles:-
Oracle optimizer blog comes up with method_opt parameter significance in dbms_stats
Randolf Geist on
Arup Nanda on streams not only for streams,
Tanel Poder shared the good stuff on Oracle upgrades (very huge pdf 500 slides)
Apologies , as I am busy with some other stuff and could not post any new from last couple of weeks, but stay expected will be posting a series of posts soon which are underway.
Keep busy reading above, will share some soon. :)