The Beta 2 Final of OllyDbg is now available and adds debugging of child processes to the feature list. The debugging engine is more stable and tricky, OllyDbg knows more functions now and there's a more or less consistent support for UNICODE and UTF8 in dialogs and comments.
Database performance is essential and the most common bottleneck of web application is the database. Often the DBA is concerned about the performance but not only he should be, it's also the application developers that should keep an eye on database performance.
Database security is essential with today's web applications. You should have the control, not the bad guys that are visiting your website. Exposing sensitive information from your database is bad, loosing data from your customers is even worse.