I see class 2 and class 6 16GB MicroSDHC cards available. Nokia seems to be selling a class 2 device as an accessory for the N900, but wouldn't a class 6 - with 40x versus 13x transfer rate - be better? Or would the N900 hardware anyway not be able to use this speed?

Hmm ideally it should. But for accessing most files I don't think it makes a difference. Now if you were to be booting off the SDHC card it would.

Unless you're doing something that operates at a high bitrate, such as video, 2x is plenty.

I wonder what speed rating the 32GB on-board MMC device has. Anyone know?

For the same price as class 2 get class 6 off of newegg--thats where I got mine.

Well, that's only SD. We're talking MicroSD, and that's only available in 16gb right now.

I'm talking about the same thats why I posted, it's a microSDHC 16GB the biggest version you can buy till Sandisk comes out with the 32GB version either later this year or early next year.

http://www.newegg.com/Product/Produc...-245-_-Product

^^ This sale usually happens with this product about every six weeks, it's normal price is around $60.

Compared with the Class 2 Nokia is selling on there website for $79.95. I'll take the one off of newegg with class 6.
http://www.nokiausa.com/find-product...dhc-card-mu-44

If you don't like Ridata there are four other manufacturers w/class 6 all under $60.

Well, I'd love a 16gb and a 32gb microsd. But for now I'm waiting until the 32 comes out so that the 16 becomes a reasonable price. $40+ is still way to much money for me right now.

I read somewhere on engadet ( I'll find the link later today ) that Sandisk is going to initially release it in class 2 & 4 and hopefully down the road a class 6.

32GB micro sdhc class 6 makes me feel all warm and fuzzy...

Well, given recent news that Western Digital just bought them, we might see that happen really soon, or we may not for ages, if ever. I like WD, but I don't like the idea they bought Sandisk. It gives them far too much control of the flash storage market, especially since Sandisk already holds an iron grip on it. There's also the fact that everything is moving to flash storage, which creates an even more frightening scenario. >.<