Of late, my Flickr Photos are getting quite a bit of attention, more specifically with the inclusion of the Windows Vista Wallpaper collection. The Photos stream has garnered almost half a million views ever since I shifted my photos to Flickr from my hosted Gallery in March, 2006. At this rate, it will easily cross half a million views per year (by March 2007).
There is no way to see your Flickr Photo usage statistics. Someone may be blogging your photos, praising your photos and linking back to your Flickstream. The best way so far is to track through Technorati. To know where your Flickr photos are being linked, blogged or mentioned elsewhere, setup a Technorati Search Feed for your Flickstream.