Boxwave came out with Mini-Sync, which is supposed to Sync&Charge Axim:
http://boxwave.com/products/minisync/ms_dell_axim.htm
for $18.50 +S&H.
I ordered one. My opinion: it is indeed very light, portable and very durable and simple to use (just be sure to pull BOTH ends to extend the cord). And it always Syncs very well.
Problems? YES. Charge feature is very starnge: sometimes it works, sometimes it does not and orange charge indicator goes off, battery indicator drops to 0. This never happens with Dell cradle.
Note that Boxwave money-back policy is strange (14 days unopened), but their customer service is EXCELLENT! They reply on emails almost immediately and they replaced my Mini-Sync for free. However, the new unit also gives troubles periodically and I need to soft reset to restore charge feature.
Does anyone experience similar problems?