I'd love to see this get on the near-term roadmap. As we hire new reps and buy new machines for them, it seems Microsoft is forcing the 2013 edition, with no option to roll back to Outlook 2010. Having half of the sales team using and loving the SI plugin while the new reps don't get access to it is a big problem for us.
It'd be great to get the 2013 plug-in soon. Any updates on an ETA? Our entire Sales team is on 2013. While they can send emails from Sales Insight within the contact record, it doesn't allow for attachments, so they're continuing to send untrackable emails.