I have managed to update the Dreamplug to kernel 3.7-rc1, after a simple fix, to get it to compile OK..

The original (cross)compile failed, with:

ERROR: “read_current_timer” [drivers/video/udlfb.ko] undefined!
ERROR: “read_current_timer” [crypto/tcrypt.ko] undefined!

Fix, is to change ../linux-3.7-rc1/arch/arm/kernel/armksyms.c, at line 51, as follows:
From:
 /* platform dependent support */
EXPORT_SYMBOL(arm_delay_ops);
To:
    /* platform dependent support */
EXPORT_SYMBOL(arm_delay_ops);
EXPORT_SYMBOL_GPL(read_current_timer);
…as suggested by a posting in the Linux Kernel Mailing List..   (search for ‘read_current_timer‘ in the LKML..)

Then everything compiles OK..

Fedora release 17 (Beefy Miracle)
Kernel 3.7.0-rc1 on an armv5tel (ttyS0)
………………
$ uname -a
Linux rgdreamplug 3.7.0-rc1 #3 Tue Oct 16 15:21:43 BST 2012 armv5tel armv5tel armv5tel GNU/Linux