I'm not sure that Blazer supports SSL/TSL ( https: ) from what I can tell. But I think Palm Pro 3 supports the secure layer protocols, I'm just not sure which Palm models it comes on.
So far, I have refused to do any banking or other financial transaction over any wireless connection whether at a hotspot or at home. Wire connections only for me.
I suppose that people will respond that I am being paranoid, and I admit I am not an expert at security yet, but I have seen live demonstrations of deliberate intrusions and man in the middle attacks. The latter are particularly bothersome since the end user is completly unaware that he *HAS* been compromised.