Well, Microsoft really made up for a light patch in January with a hefty dose of vulnerabilities this month. We had our hands full dealing with this avalanche, we have coverage for the non-local vulnerabilities, only a couple of issues were covered in previously released rules, the rest are all new.
Check out the rule release details here: http://www.snort.org/vrt/advisories/2010/02/09/vrt-rules-2010-02-09.html