I decided to take a quick look at the Gambas link and status today. Some of the key elements I picked up on are:
VB style -- that isn't necessarily what I'm looking for, but should please some people.
Interpreter -- again, that is not ideal, but on a quick PC this could still work out pretty well.
Ubuntu status: Good -- now that I am committed to working just with Ubuntu, it is good to know that it will compile and work on this platform.
Windows status: Bad -- problem getting it to work with GUI, so at present it is not really functioning well under Windows.
Bottom line then is that you can have a VB-style BASIC on your Linux distro right now, but as an interpreter rather than compiled language, and you will have to wait a bit before you can also enjoy it in its entirety in Windows. And you have to be prepared to build it on your PC, because it does not appear that they are distributing a ready-made binary that you can just download and use.
It's anybody's and everybody's choice about what to do at this point. Gambas may be just what someone is looking for, and of course it is free. But I've been spoiled by the lightning speed of the PowerBasic compilers for so long that I really have a strong preference for something beyond an interpreter. Still, someone's experience with getting and compiling Gambas would be beneficial, as well as any comments after the install about how well it works, what can be done with it, and sample code would be welcomed.