Nibris coverage, interviewed the enigmatic Polish developer about their possibly-upcoming projects. Apparently, Raid over the River and Double Bloob both have publishers and vague release dates, but "not for all territories." Optimistic DS fans (presumably those in Europe) should look forward to Double Bloob in "Q4 2007" and Raid over the River (now possibly called Ride over the River or simply ROTR) in "Q1 2008".
Some gameplay details about both games are revealed in the interview, including touchscreen integration for ROTR that, if real, sounds like fun: the game contains a slow motion mode in which you draw on enemies to target them for a special attack.
They're considering bringing a version of ROTR to the Wii Ware download channel as well. Let's hope they release something, somewhere. The title quote may be referring to Nibris's non-plans for a Sadness sequel, but we'd like to see something happen once.