Donīt think IBill will go anywhere, however there might be some changes in their operation size (which I actual think will be good - imho. they have lost the dynamic of the adult processing, when they got big in mainstream)...
Looking at their processing from mid December and the first few days of January it was not good, however the last few days have been good, so maybe they have gotten their act together. IBill have always have less "country" based scrubbing, than any of the other big processors, dunno if that could have caused some major chargeback fines from visa - anyhow they still accept cc from most countries in the world
They also lost alot of small clients because of the visa fees and technical issues (people getting paid late etc.). But as I said then it looks like they have gotten the technical issued solved
ARS, and Maxcash still uses them, and I donīt think they would be processing with them, if they thought IBill was going bust.