> Some of my add-ons are saying 'incompatible' with 1.1..
Maybe, the developer of the add-on has forgotten to update the add-ons, and they are marked as compatible only with 1.0.

> When is fennec 2.0 due?
Here is 2.0 alpha:
http://ftp.mozilla.org/pub/mozilla.o.../binary-armel/

What add-ons are "incompatible"? In most cases, it's enough to change maximum Fennec version in add-on file to make it compatible. There isn't much difference between Fennec 1.0 and 1.1 and even 2.0, for add-ons.

Just name the add-ons, and I give you .xpi - s for Fennec 2.0.

How? Rename .xpi to .jar or .zip, take install.rdf from archive, find where it says maximum possible version of Fennec, write 2.*, save changes, put install.rdf back into archive, rename archive back to .xpi - finished!