I’ve been working on some changes lately on SisoDb. Mostly it’s been about cleaning the code base up but also bring in support for spatial data as well as cachable queries. There’s a bunch of changes and I will cover some of the here soon. You can have a check at the release notes here: http://sisodb.com/wiki/release-notes
While typing this I’m currently running an app that uses these new features, against a SQL Azure database. Once you have deployed the DB, SisoDb seems to work fine. Not tested all the features though.