At the moment, we are effectively fixed into using the Standard version of SQL Server 2008 R2, which means we are tied into the 64GB memory restrictions. Researching this, I've come across various reports of open source software which can latch onto SQL Server, effectively replacing SQL Server's cache (with the exception of execution plans) - though there seem to be many options, such as:
AppFabric
Memcached
Regis
Would any of the above options allow to me to exceed the 64GB restriction of the standard release of SQL Server?