Earlier this week Microsoft IIS team released its URLScan 3.0 (beta) to help fight SQL injection attacks at the Web Server, now Microsoft has put out another tool, this time in the form of a Code Analyzer. Microsoft Source Code Analyzer for SQL Injection should help out to quickly analyze and secure any existing ASP code.

Microsoft Source Code Analyzer for SQL Injection [Community Technology Preview (June 2008)]
Static code analysis tool for finding SQL Injection vulnerabilities in ASP code.

Also, there is this tool from HP that allows you to check your sites against these types of vulnerabilities.

Scrawlr (offered as-is and is not a supported product by HP)
Developed by the HP Web Security Research Group in coordination with the MSRC will crawl a website while simultaneously analyzing the parameters of each individual web page for SQL Injection vulnerabilities.