For Ottawa...
Jason Spezza (19 points in 28 games) will be competing with Rick Nash for one of the forward spots <22. Nash has the edge at this point IMO, given he plays the wing, is a little more physical and is probably a better fit on a depth or role playing line than Spezza. I don't see both making it, given Fleury and J-Bo will probably take two of <22 spots, although you never know.
Martin Havlat (16 points in 20 games) is 22, but turns 23 in April, so he probably doesn't qualify for the Czech's, although he will be on the WC team.
Anton Volchenkov (3 points in 16 games) turns 22 in February, so I assume he will get some serious consideration for the third <22 spot on the Russian team. I'm assuming Ovechkin is likely to make the team, and Kovalchuk is obviously a lock.