I just installed imobimac on my macbook b/c bluetooth tethering with my T-Mobile BB 8100 sucks (they have a bug in their firmware that requires me to remove my BB's battery after each connect).

Any way, for users that just want web access i think imobimac works great and reliably. I configured Firefox to work with it and I've have zero problems. It doesn't work if you have PocketMac installed as was noted above, but it DOES work if you use Missing Sync (which is what I use anyway).