Hi,
Thanks to share your post.
For the issue, do you mean that you are worrying about the re may be some hidden dangers in applying the Cognos in SharePoint? The thing you may care about is adding
authentication information in the data source. And you may refer this article for some detailed information:
http://hermansberghem.blogspot.com/2007/09/how-to-enable-cognos-reports-on.html.
And as for the Cognos 10.x, do you mean the IBM Cognos 10.x? If yes, please refer to the followed two articles, they should give you a hand:
http://www.envisn.com/envisn-cognos-blog/bid/49260/What-s-New-in-IBM-Cognos-10.
http://www.ironsidegroup.com/2010/09/06/understanding-the-benefits-of-ibm-cognos-64-bit/.
Hope this could help you!
Leo