I got frustrated with Avantgo and switched to a RSS reader. I use pRSSreader. Its free at http://pda.jasnapaka.com/prssr/. Its not the exact same as Avantgo, but very similar concept. I personally think its much better performance wise. Main drawback is you only get a summary of the articles and a link to the full articles.
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An (X) indicates a Wi-Fi post from my Axim X51.
Live every day like it is your last....because some day it will be.
If you find yourself falling off a cliff, you might as well try and fly!
There's a program called mobile play. I tried it on my x50v, but it took up a lot of memory. Its content seems more limited than avantgo. I have not reinstalled it on my51v, but you might check it out.