Synk 5.1
I like the interface and features of Ben Rister’s Synk, but though 5.0 was reliable, it was also slow and memory-hungry. The just-released version 5.1 is supposed to fix that. When Apple announced that Tiger would include a Mac-savvy rsync, I figured that I wouldn’t be needing Synk any more. Because it takes advantage of the fact that the destination machine can do stuff, rsync is much faster than other such utilities I’ve used. However, rsync -E has so far not been reliable. I continue to use Synk, and early indications are that it is indeed faster and uses much less RAM. Ben has provided good, friendly support, and you can’t beat his guarantee.
It turns out that although Synk 5.1 improves the memory situation, it doesn't fix it. Synking my home folder still slows to a crawl as Synk consumes 1.7+GB of RAM. Ben says that the changes that were going to be in 5.1 are now scheduled for 6.0.