They reported this in
Flight Daily News at Farnborough.
FARNBOROUGH 2008: Oman pushes the Typhoon door ajar-18/07/2008-Flight International
So it's gone from a 'glimmer of interest' to reported negotiations.
I'd be cautious about believing that it's gone that far. Wouldn't we expect Oman to be a Government-to-Government deal like Saudi - done via DESO as was, rather than BAE?
Taking Block 8s away would seem to be a good thing, to me. The RAF isn't ready for them, hasn't got the pilots to stand up another squadron, and could do with deferring the spending. Moreover, the Block 8 won't have the Austere A-G capability, and so won't be multi-role until P1E, which won't be here for five years.
As long as aircraft are replaced (as the Saudi ones will be) later down the line.