T-Rex does play XDreamTV at the moment (but only via temp Constant Control Words).
Lots more open on Diablo and as dxdy states you can get RAI on Diablo with Fun/Gold cards on 13E or tuning to different transmissions of RAI:
NB. RAI UNO is also available FTA on 19.2E (Astra 1L) 11567V S/R 22000 FEC 5/6 & RAI UNO/DUE/TRE are also available on 23.5E (Astra 3A) 11675V DVB-S2(MPEG4 High Def) S/R 28500 FEC 9/10 with Kabel Deutchlands Nagravision2 keys, when available/known (see Nagravision section). And Currently on Diablo2.3 EMU @ Atlantic Bird 2 (8.0W, Kabel Kiosk - Conax, but some schedule changes in 8W versions) 11012V DVB-S (QPSK) S/R 27500 FEC 3/4.
13E Freq details:
Hotbird 6 (13.0E) 10992V S/R 27500 FEC 2/3:
RAI UNO / RAI DUE / RAI TRE / RAI 4 etc (Seca/Mediaguard)
Hotbird 8 (13.0E) 11766V S/R 27500 FEC 2/3:
RAI UNO / RAI DUE / RAI TRE etc (FTA ie Clear some events codified in Seca/Mediaguard)