If the corrupted file is the file that is holding the structure of the page files, after you bring the database from the suspect state you can try to export data out...

Can you post the error messages that you are getting after the checkdb.

Yes, I think so since each instance has its own set of binarys plus it would be a mess otherwise if you have for example SQL 7 and 2k installed...

For file defragmentation, I heard indeed that Diskeep does a good job been able to defrag files in use and base on a schedule, never use it though.

Regarding

"The defrag...

You might want to look at DoubleTake, it claim to do real time syncronization.

We are using Trend Micro. Never had any issue with databases getting corrupted.

What antivirus have you guys used and had issues with?

just a guess, are the entrys in the sysservers correct?

See the

http://support.microsoft.com/default.aspx/kb/822756 

http://www.sql-server-performance.com/forum/post.asp?method=TopicQuote&TOPIC_ID=6112&FORUM_ID=4

for the

2006-01-19 12:33:39.31  spid455 Error: 3624, Severity: 20, State: 1.

2006-01-19 12:33:39.31  spid455 SQL Server Assertion: File: <scanrid.cpp>, line=321 ...

Base on the

2006-01-19 12:33:36.73  spid455 The index entry for...

The log file will increase significantly if the database is in full recovery, lots of activity and transaction logs backups are not performed or there are big transactions happening.

Since you are...

can you check in the execution plan of the prod server for hash joins and tables scan

Do you have SP4 applied. I read several posts about performance issues after SP4 was applied.

When you choose between Replication and Logshipping I think someone should consider the fact that with Replication the database corruption isn't propagated, just sql statements are, but with Log Shipping...

When you say ""contimuosly updating" subscriber" do you mean a combination of SQL Agent and Replication executables?

"above friendships and likes and dislikes, effectiveness matters to managers" 

I think this is an idealistic way of seeing the managers, from my experience friendship - buddy type of relation matters...