Had the PB for a week now, and i'm getting on great with it. i no longer use the wife's ipad, and rarely use the PC. However because i now use it for banking shopping online and surfing the web do i need any security or anti- virus software? Is it as secure as everyone says or do i need to protect this great big of kit from outside interference?
There will eventually be anti-malware apps for the PlayBook whether needed or not.
There have been some security related issues in the news, but no viruses or worms or trojans.
My opinion is you will be ok if you stick to best practices. In particular, be cautious what you install and use good judgment. So far there is nothing malicious that is going to get on the PlayBook unless you put it there.
Also, use secure wifi. Don't do sensitive stuff over public wifi.