I ran a quick and dirty petition on my blog asking people to respond in support of Crossover on Solaris. The respondents were positive and we also had one person express that they would find it useful in an enterprise deployment. You can view the page at my blog here: http://synesius.wordpress.com/petition-codeweavers-for-solaris-x86-support/
These results aren't exactly scientific - my blog isn't particularly high traffic but it does show that there is steady support.