Oooh, a "database" patent!
"a common workflow layer that is automated with a scalable, relational database. The tool includes a relational database engine that facilitates many-to-many relationships among data elements, in addition to, one-to-many and many-to-many relationships"
So they'll actually have to sue Oracle, IBM (for DB2), Sybase, Sun/MySQL, Firebird, PostgreSQL because all of those are capable of "many-to-may, one-to-many relationship mapping".
Of course, if the patent actually is about the coupling of a common workflow layer automated with any RDBMS ... well, they'll have to sue Sun over J2EE and subsequent Java EE 5 releases. Except um... J2EE's been around since last century.
Or SAP AG, as they do workflows. Or Notes, which I think also uses an RDBMS. Or GroupWise. Hell, even Microsoft has a "common workflow layer using RDBMS" under the name of Microsoft CRM (or whatever its called now) with their offerings!
This would mark a first, I actually hope that Facebook wins this stupid patent troll lawsuit!