I'll add my sentiments, as I've left this phone (and forum) to move up in the world of phones.
I was a happy Galaxy i7500 owner as of last September...at least for a little while. But the bugs and the continual wait for what ended up being only slighly better firmware made me realise I had to take more drastic action, like run Galaxo.
I got tired of messing around, reinstalling apps around November and although I would keep watching the forums and for an decent announcement from Samsung about 1.6, then 2.1...I finally gave up.
Just recently, I complained to O2 and was given a reduced fee for leaving months early (they don't know how happy I was to pay it) and decided to AVOID the Samsung world altogether and go with an HTC Desire. Wow. It is what I think we always expected the previous smartphones to be like like. Snappy response. Great interface. Cool features. Yes, battery trouble is still a factor, but (as its been said before) when you take a micro-laptop and use battery intensive features, what do you expect?
Sadly, now that I no longer have my Galaxy as my main phone, I have the freedom to install ROM's and mess about with it. I will say that the recent improvements to Galaxo are quite good. And running 2.2 with GAOSP is very impressive, but until you feel just how slick a 1ghz Desire feels, you realise the Galaxy (even overclocked) is being stretched to run it. I can almost concur with Samsung that their decision to not want to put 2.1 and 2.2 forward for the Galaxy keeps them from dealing with a lot of negative feedback about performance. But saying that, knowing how great the negative feeling is about Samsung because of their rather blatant 'dropping' of the phone for the new models, like the Galaxy S, I don't know if they've still shot themselves in the foot regardless.
In any case, I wanted to add to the appreciation of all those that spent a lot of time discussing the options available and answering questions (Kam and Rastaman specifically spring to mind). And even more credit to Drakaz and others who have been able to achieve so much. I now have a fairly decent phone running GAOSP (don't need a sim, just good as a hi-tech device on its own) which I don't know whether to sell, hang onto for for fun and testing new ROM's or keep as a spare (hopefully never needed).
One last comment: enjoy your Galaxy. Take the step to upgrade the ROM with Galaxo, GAOSP, etc., because Samsung just isn't going down that path. Get as much pleasure as you can from it...but as and when you decide to upgrade, you will definitely be pleased. It's not a world away better (esp. as the battery is always a factor) or 'game changing' better, but if you're impressed by the way Android works on your phone, then the next improvements and the faster phones should put a nice, big smile on your face.
For me, its:
Say hello (to a HTC Desire)
Wave goodbye (to my Samsung Galaxy, that was badly treated, like a poor step-child)
P.S. Sorry for the long post. I guess that's months worth of bottled up frustration spilling out. ;-)