[NTLK] Some newcomer questions

[r0]

Hi there,

I've slowly started to use my "new" MP130, but I've got some questions 
about the Newton ecosystem.
I haven't found much by searching online, so I thought I could ask you 
guys.

1) Does the 130 support all memory card sizes?
2) UNNA is down, what are the best apps available for such a Newton?
3) What's the best way to sync a Newton to an iMac G3? Should I get one 
of the expensive serial-to-USB adapters?
4) Is IR worth it?

Thanks for your help :)

(on a side-note, I'm still looking for more Newton products. message me 
if interested!)