Thanks to Dollverse for the info:
The press release for episode 12 of Dollhouse, titled ‘Omega’, says that it’s the season finale — FOX has decided not to air episode 13 after all — but it will be available on the season 1 DVD, which will be released sometime after Comic-Con in San Diego (end of July.)
And finally, FOX are still deciding whether to renew Dollhouse or not, though there have been rumours of a second season being confirmed.
Bittersweet news. However, I’m keeping my fingers crossed!