goatpig,
ok perfect that answers my questions. So there is basically no risk if I was to use the import feature on blockchain to transfer some coins from some addresses (but not all addresses in the wallet)?
I think there is a confusion here.
...
Originally, l.j2300 asked if it was risky to non-exported privkeys if some, but not all, privkeys were exported from Armory to a web wallet. My answer (even though I got the details all wrong and goatpig corrected me) was no, don't do that, instead just transfer some bitcoin from your Armory wallet to a new convenience web wallet.
I'm not sure, but I think l.j2300 had a reason to want payments to some pre-existing addresses to go straight to a web wallet. For this, I said the best option is to go ahead and export/import the privkeys from Armory to a web wallet, but then stop using the old wallet entirely (and then create a new Armory wallet for additional savings not stored in the web wallet).
As far as I know, these are the only two safe options. I don't see a safe option for using some existing addresses with Armory, and some with a new wallet. You should really use your existing addresses in one place or the other, and then create a brand new wallet in the other location. If you go against this advice (and use your existing Armory privkeys both inside Armory and in a web wallet), I don't think you'll be instantly compromised, but it's a bad idea...