flickr 大きさ指定の実際の大きさ
http://webdba.blogspot.com/2008/04/google-app-engine-flickr-api.html
http://www.flickr.com/services/api/misc.urls.html
mは240max, tで100. ブログパーツ的には微妙だけどtか・・・??
Size Suffixes
The letter suffixes are as follows:
s small square 75x75
t thumbnail, 100 on longest side
m small, 240 on longest side
- medium, 500 on longest side
z medium 640, 640 on longest side
b large, 1024 on longest side*
o original image, either a jpg, gif or png, depending on source format