Default [REQ] Ap to update weather/twitter etc

Hey guys

Was wondering if there was an ap (or a reg) to update my phone when it recognizes a connection. Instead of having to have my connection open all the time.

I would like my weather and twitter to update whenever there is an internet connection automatically.

I want it to work like the AGPS where it recognizes that there is a connection and updates automatically.

I DO NOT want it to create a connection itself, or update periodically, just when one is available.

I think that makes sense...

Anyone know of anything like that?