I moved to 1Password from SplashID recently, and it has an automatic import function that supports SplashID CSV files. Export from SplashID desktop, import into 1Password, and you're done. The import is not perfect, and it doesn't have as many automatic categories as SplashID does, but it does work and it got everything over. Everything that is a web form came over correctly, everything else gets stored as a "secure note".
I really like the Palm version of SplashID, but the lack of a decent desktop equivalent for the Mac made me make the switch. Plus the fact that 1Password supports desktop browsers much better - I hated having to pull out my Treo or do a copy/paste everytime I wanted to remember/enter a password on my computer.