I started to explore Lazarus 0.9.22 (fpc 2.0.4) with ZEOS 6.6.1 beta, and it seems to be quite stable and feature rich.
When I tried to do it a year ago, it was a nightmare, but now it works very nice.
With SQLdb, on the contrary, I realized some problems regarding passing parameters to SQLQuery. Also, it seems to be limited in functionality, when comapring to Zeos.I suppose, it is better to rely on ZEOS, especially because it provides more components, properties and methods.
For example, you can create master/detail forms very easily in the same way like in Delphi, using Zeos. I think there is no such feature in SQLDb...
Anyway, it is just my temporarily impression:)
Regards,
Zlatko