Since i couldn´t resist to use Hero as an everyday ROM i tried a lot of tweaks and optimizations in order to get it running as smooth as the ROMs from Cyanogen. And now i have finally got to the point for myself where i can say, i am running at around 95% of the same speed. So for me, it is now usable as an everyday phone.
Therefore i used JacHero´s Rom 2.3.3 together with apps2sd, swapper and TA Utilities.
But i got the most out of it with replacing the Rosie.apk which is normally around 4,5MB with a highly stipped down version which is only 336KB big (JacHero´s one is allready stripped down to around 1,6MB).
If anyone needs help installing Hero on his or her G1, i am willing to post a How-To.
Attached some screenshots:

Today, i tried a really stable Hero release on my G1.
At first, it looks really great, but even with overclocked cpu to 528MHz and external apps, it runs to slow (in my opinion) in order to use it as a everyday rom.
So now i will go back to Cyanogen. But you have to know, if you want to go back, you have to format your SD card again completely. The FAT32 partition for the standart stuff and the ext2/3 partition for Apps2SD.
If anyone will give it a try look over to xda-developers.com.