Tonight I added the dev_bundle binaries for ARMv6 architecture on bintray. Now you may also use this release on the first Raspis.
Let me say that this devices are getting slower and slower as often that meteor raises its functions.
If you build your very first project on the Raspberry 1 be aware of nearly 1.5h preparation time. This will be much faster on the next runs but the first one is already a long runner. To build the complete package by your own (node, mongo, meteor dev_bundle) it took me this time nearly 3 days.
Please check my vote for architectures if you are interested in the universal fork of meteor.
Thanks
Tom