RootBSD [1] has been around for quite a while. I personally use fileMEDIA [2] and LunaNode. fileMEDIA provides a set of isos, among which you can find FreeBSD, OpenBSD and DragonflyBSD (i personally requested them the DFBSD one). On LunaNode you can upload any ISO image or qcow2 file you'd like.

1: http://www.rootbsd.net 2: http://www.filemedia.de 3: http://www.lunanode.com

RootBSD is insanely awesome and is the one I'd recommend whole heartedly.

Compile your own kernels, your own world, and they are always on hand for assistance for things that you need help with.

I've been a happy customer for a number of years.

I run FreeBSD on Greenqloud.