File transfers has been a long standing problem within the jabber community and the present solution using the so called bytestreams protocol is far from perfect. A kind of improvement by using symmetric streamhosts called fast mode is being used by Psi and Coccinella, but this extension was rejected by the Jabber Council (?) for reasons unknown to me. I can guess why; it is a bit complicated to implement, especially with stream proxies.
Coccinella's new website has been around for nearly a week (that page shows the date when I started writing the article, one day before the announcement has been published). So, I guess it is interesting to look at some website statistics (note that all statistics in this article are from the 25th of April until the 6 of May, unless stated elsewise).