[Mike T.]

If they lost tension then the wheel would be untrue. Is it?
Ping all the spokes (on the same side of the wheel). Pluck 'em like a geetar string. If these two are close in tone to the others then they didn't lose tension. If they are a different tone, they did lose tension so just tighten them to the same tone as the others. A minor truing might be needed. Hold the spokes straight or twist them back into straight with a pair of pliers. The real tool for this is a simple gizmo with a slot cut in it - like a saw cut..

 

[Mike T.]

Any recommendations as to what kind of spoke tools to use on these Mavic bladed spokes? Tool companies have them in a few different sizes.

You mean spoke wrench? Most nipples take the black Park Tool (or equivalent) wrench. Get a good one that touches all four corners.

http://www.parktool.com/products/detail.asp?cat=16&item=SW-40