In reply to monkey kong:
its not unusual for bishkek to have these eruptions, but theyre usually not this far reaching.
the place rarely gets any reporting (how many people can pronounce it or find bishkek on the map) so the history of unrest goes unnoticed until its really strikes a chord.
bishkek never has been a particularly safe place (ive had a policeman pull a gun on me downtown near the entrance to the university in broad daylight), tho it is quite spread out so, as in the past, riots and demonstrations can affect one part of town and not another.
id be concerned about borders being closed, tho manas is very safe and in the past has been the haven when things have gotten ugly (US airbase that also houses a special operations unit is next door).
for thoe with expeditions there: it could all settle down very rapidly and be back to its normal dodgy self soon. there is huge interest in the place from big players (cant believe the article doesnt mention the chinese presence).
see where your exped is based out of too. bishkek is a long way from most jump off points to the mountains (if your headed to the tienshan or pamir) BUT if trouble spreads to osh be prepared to rethink a visit.
osh is even more unstable and has a tendency to dissolve its civil issues into ethnic ones that genuinely do erupt into gun fights. plus its not easy to get out of.
that said, its also a world away from bishkek so may not be affected.
if youre really worried think about getting a contingency visa in case you need to leave fast. most surrounding countries are not that visa friendly, tho uzbekistan allows transit visa free (tashkents an hour away from bishkek).
also, dont go by govt travel advice - anywhere with a stan it they will have been telling you not to visit for years now any way.
i have decent UN contacts there so will post anything useful as i hear about it.