It looks like Google is indexing this site (sqla.stackexchange.com) so you can use good ol' Google Search as follows:

• [your search string] site:sqla.stackexchange.com

Also, there are two Google "Custom Search Engine" (CSE) thingies at the top of this page (look up, look wayyyy up):

• Search SQLA+blogs
• Search SQLA

The CSE thingies are brand new so the coverage isn't as good as Google Search... yet... but they will probably get better with time. Don't ask me how Google works, ask Gandalf.

The SQLA+blogs thingie uses these URL patterns...

   sqla.stackexchange.com/*     
   iablog.sybase.com/efarrar/*
   iablog.sybase.com/tslee/*     
   iablog.sybase.com/kleisath/*     
   iablog.sybase.com/hinsperg/*     
   iablog.sybase.com/paulley/*     
   sqlanywhere.blogspot.com/*/1*/*     
   sqlanywhere.blogspot.com/*/0*/*

The SQLA thingie just uses one URL pattern...

   sqla.stackexchange.com/*     

Finally, you can always use the official StackExchange "search" thingie on the second line.