WA2 lite is OK, but new HandySwither (v2.7) is the best: only 11.9kb of program memory and fully one-hand operation. No problems with phone application and comm manager too.
i use both WA2 & Spb pocket plus and both work quite well on my Jamin. do not use the WA Desktop since it is useless if you really want to use Spb plus the only problem i face with the Spb is that the actual themes will not show on the Meter bars (Battery, Memory, etc.)