There are four advisories for Microsoft Office this month.  All of them appear to be standard client-side vulnerabilities.  So the exploitation model is someone evil sends a document (of the affected type) with an exploit buried inside and if the exploit works, the attacker gets the privileges of the user opening the document.  These types of bugs have been very popular lately.

MS06-058: Four vulnerabilities in PowerPoint.  One of these vulnerabilities have been exploited in the wild (PowerPoint Malformed Record).

MS06-059: Four vulnerabilities in Excel.  Two of these have had proof of concept exploit code posted publicly already; the other two vulnerabilities were privately reported to Microsoft.

MS06-060: Four vulnerabilities in Word.  Two of these have been publicly disclosed already; the other two vulnerabilities were privately reported to Microsoft.

MS06-062: Three vulnerabilities in Office and Publisher that were reported privately.  Exploit code and details have not been released yet.