Wordpress blog. There is not a lot of information on the artist of these works but they are a lot of fun. This is actually a paper craft that you will need to assemble. The results are worth the trouble. Excellent design and instruction. I recommend using card stock or stiff "scrapbook" papers.
Livejournal blog 1_noshi: There is not a lot of detail about the construction in this post, but the author created an amigurumi version of the microbes using crochet.
DeviantArt Artist: kyut530: More yummy crochet microbes created in amigurumi style. I have spoken with the artist and patterns will be coming soon so you can have your very own Moyashimon-yarn goodness.