IcedTea-Web 1.1 has been branched! A list of features/fixes in 1.1 are in the NEWS file here:
If you are the adventurous type and would like to help us try/test it, checkout, build and usage instructions are here:
Instead of checking out from http://icedtea.classpath.org/hg/icedtea-web (trunk), just use http://icedtea.classpath.org/hg/release/icedtea-web-1.1/
The 1.1 release is tentatively scheduled for May 6th 2011 and we will be fixing any major issues found, until then.