I wouldn't draw too many conclusions on an R10 timing from this. It may simply be that manufacturing volumes are so low that it is no longer in Leica's financial interests to make the lenses/bodies - as per Glen's comments.
Given new prices, the VAST majority of Leica R lenses circulate within the used market for use on Canon an now (with some units) Nikon bodies. This SHOULD give Leica a hint as to what acceptable prices will NOT be with any possible new AF R-Mod2 glass they may bring to market - if they even hope to expand their business outside the cottage "it's a Leica, I will thus buy it" devotee segment.
A reliable US$5800 Leica body might sell well - assuming stellar AF, 16-24MP, D3x-esque ISO capabilities, LV, etc etc, etc. But (and it's a big one) if you need to bolt $4000-5000+ lenses to it as well.....
Given the release timing (if ever) it will be VERY tough pitting a near $10,000 one-lens Leica kit to a "depreciates like a rock of a cliff" market filled with used/lower-priced D3Xs, the D700x, the A900/Mod2, the 5DII, used 1Ds3s (or maybe 1Ds4s) - all with state-of-the-art (for most people's needs) AF glass for at or under $2000 a copy (barring long teles). It gets more complicated given that we obsessives can also cheaply bolt used R glass to all but the Sony bodies.
This of course assumes any current Nikon, Canon, Sony high-end body user is willing to even take the hit necessary to make such a shift in the first place. The legacy of the M8's teething problems and Leica's legendarily slow service will give MANY people cause for pause in this regard. Jumping from Nikon to Canon or Canon to Sony is one thing, from any of those three to Leica is another - at least given recent history.
Personally I think the body will be closer to $8000-10,000 (hell the MF film R9 still lists for $3000 new - body only). The R10s manufacturing volume (at least initially) will be lower than that of the M8/8.2, it's complexity higher (e.g. AF), the electronics content higher, the materials as spendy (e.g. more metal than a normal DSLR), the sensor larger and the labor costs higher/same per $ of materials. There is also the fact that the R&D costs required to be recovered with the R10 and S2 will be VERY large and still very freshly bleeding vs. the M8/8.2 which has seen minimal (LOL) incremental R&D spending since it's initial release.
As for timing, I don't think you'll see anything until/if the S2 proves it has legs - in part due to basic business common sense given the firm's limited resources/managerial bandwidth.
There is also the fact that the R10 is expected (as it should) to share tech developed for the S2 (e.g. AF) which will need to be finished and put thru the inevitable customer-based QC testing ;> The latest copy of LFI (one with the fashion test) also doesn't inspire much confidence in that regard re: an "early" S2 release either -- essentially stating there was still a lot of work to be done re: the S2's AF system, power management and processor responsiveness, etc.
Time will tell.