UPDATE, INTEL PLEASE READ
Okay, after about a week of debugging I may have found something fascinating. So, the BSODs in NetW5S32.sys were still occuring during WiFi use of 802.11n/g with WPA2-PSK encryption. Just on a whim, I decided to set my router (Linksys E3000) to limit the 2.4gHz band to WPA-PSK (used to be mixed mode WPA/WPA2 PSK). Then redid the WiFi connection on the SL510 to use WPA-PSK. Now about two hours later and almost 3gb transfered (I did some heavy throughput copies), there have been no further BSODs.
So, definately appears to be a driver problem, may be throughput related (since the WPA mode limits the 802.11n to 54Mbps) or could be other driver software issue.
Any recommendations or ideas to further reconcile - or leave as is?