The debate Europe site is actually the next best thing to Eurotrib in terms of community potential, only the commentary there is often not well-informed. It runs from Far-Left to Far-Right with everything in between. Cafe Babel also has a forum which is actually used, but I haven't delved into it.

A center-right to far-right site doesn't exist among the Euroblogs. Places like EU Referendum and the BJ are obviously far off the map. A Fistful of Euros is quite centrist, it has some moderate right- and left-wing bloggers. But posting there is a bit irregular. The TransAtlantic assembly is another interesting group-blog, somewhat more to the left and always on the cross-section of law and politics, and with a lot of intellect.

The Federal Union Blog and John Worth's Euroblog (which I only just discovered) seem to be part of a larger trilingual online federalist mag called Le Taurillon. Also well worth reading.