Your bitcoins in other wallets will also be de-valued if Mt.Gox blows up.
It will make people question other exchanges stability as well unfortunately.
And honestly: I like BitStamp, but what makes you think that they can't go bust. Even banks (and they have some regulation and minimum capital requirements) blow up.

Like it was said: The only real solution is p2p. Exchanges will always blow up, cut down by regulators etc.
Right now there are two stable exchanges left, BitStamp and Coinbase. For CoinBase you at least know the team and that they got a truckload of venture capital money.... for BitStamp: unknowns in Slovenia, now 1 british pound limited company.

No faces on their website. No disclosure of earnings and reserves etc.
If someone wants to build a trustworthy and stable non p2p exchange, he has to disclose all that stuff: persons, financials, location, etc.

Nobody in the BTC community is working on building trust right now, which is a bad signal for new people in terms of adoption (i never posted here, but i am a bitcoin adopter since the very beginning).