The mayor's announcement that the squat, 'Africa House', will be evicted very soon, is not the first of it's kind, however it is the most serious and even if it is not within the next few days eviction is imminent.
A local article on the subject can be viewed here, in French.  http://www.nordlittoral.fr/actualite/Faits_divers/Faits_divers/2011/06/22/article_l_accueil_des_demandeurs_d_asile_en_ques.shtml

Calais Migrant Solidarity is still working day to day to support migrants and combat police repression, a major problem in Calais. Just being a presence or observer can make a huge difference. If you have any time to spare, either in the next few days or in weeks to come, we could really do with more people on the ground, either for defending Africa House or for searching for and opening new squats. This will depend on the wishes of people in the current Africa House- CMS is working to discuss the near future with the migrants. If you can come, the most important thing to bring is YOU, but second to that tents, tarps, blankets and anything to make shelters are essential right now (and it is festival season...). Pots and pans and the usual are also useful if there is extra space.
No experience is essential, but anyone good at opening squats is always really useful. Please visit the website for more idea of what coming to Calais involves.