Kadima certainly does have something to offer Lieberman that's probably quite important to him- Interior. Many of Lieberman's supporters are from the FSU, and many of them are not technically Jewish. The Interior ministry could be quite important and useful to them. Toss in Pensioners and you've got seats in the mid-60s. On the other hand, if Shas or UTJ can be brought around to supporting "convergence," then I wouldn't be surprised to see a left + religious coalition instead.
EU's Mogherini in Tehran to talk nuclear deal, regional issues (Reuters)
from the article: Katsav to summon Olmert on Thursday to form government