Nintendo DSi XL Questions

[CrimsonKnight13]

I bought a DSi XL last night on ebay & started to wonder a few things.

• What is the max size SD card that can be used with current firmware?
• Max size for SDHC?
• Can it read SDXC due to it being an extension of SDHC?
• Any known caveats with 802.11g WiFi connectivity over a mixed 802.11g/n network?
• What is the normal point price for digital games?
• Any GBA games available in the DSi store?
• Can I register a used DSi XL with my Club Nintendo account?

I appreciate any insight. Thanks.