I got tired of waiting too and I am glad I just went ahead and did this
Samsung I5700 Galaxy Spica Android 2.1 Flashing Guide | It's All About Software, PHP, JavaScript and Android Programming
Its been 10 days now and I've had no problems whatsoever. In fact things are better now ! Just backup your APN settings before you upgrade and whatever else you need to backup.
1. The new Unlock slider is exactly what I wanted.
2. Live Wallpapers rock.
3. Battery life has improved a bit ( depends on things you have running in the background of course)
4. Overall feel is much much better and a sense that things are faster. Lots of additional settings to make things smoother. You can control animation speed and effects.
5. Exchange Support is there BUT it doesn't support security policy enforcement and that rules out a majority of users who want ActiveSync on their Android. No worries for me. I use TouchDown for Android (its just $20 and is amazing !!).
6. New gallery is awesome !!! You can sync your Picasa photos as well.
7. Supports multiple Google accounts.
And a whole bunch of other minor things. Overall, its rock solid and easy on the eyes too once you install the LkMod pack
WORD of CAUTION: Follow every step of the guide as it is described especially if you've never used ODIN before.