Information to everyone that got stuck with a Aldi payg and no GPRS connection. I came across the bug and it is so simple to make GPRS work like a charm.
When you get the provider settings from the Aldi page, it will set up a Data Profile for APN wap.eplus.de. It seems, that with this settings, there are big problems. Simply change the settings to gprs.eplus.de and chance the password from "wap" to "grps", user keep as is: eplus
Done that, I had immediate access to my emails, even roaming in Switzerland and Austria. The Aldi Talk payg will roam like a charm in vodafone networks like Swisscom and A1.
Thumbs up...
BK
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